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Thyroid

Index Thyroid

The thyroid gland, or simply the thyroid, is an endocrine gland in the neck, consisting of two lobes connected by an isthmus. [1]

283 relations: 'Ali ibn al-'Abbas al-Majusi, Aëtius of Amida, Acute infectious thyroiditis, Adam's apple, Addison's disease, Adenylyl cyclase, Alps, Amiodarone, Amphibian, Amyloidosis, Anaplastic thyroid cancer, Ancient Greek, Andreas Vesalius, Andrew Schally, Angina, Anterior pituitary, Antiarrhythmic agent, Antiporter, Apoptosis, Aristotle, Autoimmune disease, Autoimmunity, Axolotl, Ayurveda, B cell, Basal metabolic rate, Bernard Courtois, Beta blocker, Bile, Birth defect, Bone, Brachiocephalic vein, Bradycardia, Bruit, Calcitonin, Calcitonin gene-related peptide, Calcium metabolism, Carbimazole, Carcinoma, Carotid artery, Cell biology, Cell membrane, Charles Horace Mayo, Chernobyl disaster, Childbirth, Chinese language, Cholesterol, Colloid, Colloid nodule, Congenital hypothyroidism, ..., Congenital iodine deficiency syndrome, Constipation, Contemporary Latin, Copula linguae, Cricoid cartilage, Cyst, David Marine, Deiodinase, Diabetes mellitus type 1, Diarrhea, Diiodotyrosine, Dopamine, Ectopia (medicine), Emil Theodor Kocher, Endemic goitre, Endocrine gland, Endocrine Reviews, Endocrine system, Endocrinology, Endoplasmic reticulum, Endostyle, Enzyme, Epithelium, Eugen Baumann, Evolution, Exocrine gland, External carotid artery, Family medicine, Fatty acid, Fetus, Fine-needle aspiration, Follicular cell, Follicular thyroid cancer, Frog, Galen, General practitioner, George Washington Crile, Gestational age, Glucocorticoid, Gluconeogenesis, Glucose transporter, Glucose uptake, Glycolysis, Glycoprotein, Goitre, Graves' disease, Graves' ophthalmopathy, Hakaru Hashimoto, Hashimoto's thyroiditis, Histology, Histopathology, Hormone, Hormone response element, Human embryogenesis, Human variability, Hyoid bone, Hypercalcaemia, Hyperthyroidism, Hypopharyngeal eminence, Hypothalamus, Hypothyroidism, Inferior thyroid artery, Inferior thyroid veins, Infrahyoid muscles, Intellectual disability, Internal jugular vein, Intracellular receptor, Iodide, Iodinated contrast, Iodine, Iodine deficiency, Iodine in biology, Iodine-123, Iodine-131, Iodised salt, Iodothyronine deiodinase, Iodotyrosine deiodinase, Ion channel, Isotope, Lamprey, Lancelet, Larynx, Leonardo da Vinci, Levator muscle of thyroid gland, Levothyroxine, Lipolysis, List of anatomical isthmi, Lithium, Lobe (anatomy), Lymph, Lymphocyte, Mammal, Median tongue bud, Medical imaging, Medical ultrasound, Medullary thyroid cancer, Menorrhagia, Menstrual cycle, Metabolism, Metamorphosis, Metastasis, Middle thyroid vein, Minimally invasive procedures, Mitochondrion, Monoiodotyrosine, Myxedema, Myxedema coma, Neck, Negative feedback, Neoteny, Neural crest, Neurodevelopmental disorder, Neuroendocrine cell, Newborn screening, Nobel Prize in Physiology or Medicine, Nuclear fission, Nuclear receptor, Osteoblast, Osteoclast, Otorhinolaryngology, Palpation, Palpation thyroiditis, Palpitations, Papillary thyroid cancer, Parafollicular cell, Parasympathetic nervous system, Parathyroid gland, Parathyroid hormone, Paratracheal lymph nodes, Pathognomonicity, Pemberton's sign, Pendrin, Peptide hormone, Percussion (medicine), Persistent thyroglossal duct, Pharyngeal arch, Pharyngeal pouch (embryology), Pierre Lalouette, Pituitary adenoma, Pituitary gland, Plasma membrane Ca2+ ATPase, Pliny the Elder, Postpartum thyroiditis, Prelaryngeal lymph nodes, Prenatal development, Pretracheal fascia, Pretracheal lymph nodes, Prevalence, Propylthiouracil, Protein, Protein biosynthesis, Psychic, Radioactive decay, Radioactive iodine uptake test, Radiofrequency ablation, Recurrent laryngeal nerve, Redox, Renaissance, Reverse triiodothyronine, Riedel's thyroiditis, Risk factor, Robert James Graves, Salamander, Salt, Sarcoidosis, Septum, Serum albumin, Sodium-iodide symporter, Somatostatin, Sternocleidomastoid muscle, Stethoscope, Stratified squamous epithelium, Subacute lymphocytic thyroiditis, Subacute thyroiditis, Superinfection, Superior laryngeal nerve, Superior thyroid artery, Superior thyroid vein, Sushruta Samhita, Suspensory ligament of thyroid gland, Sympathetic nervous system, Sympathetic trunk, T cell, Tadpole, Technetium-99, Teleost, Tetrapod, Theodor Billroth, Thermogenesis, Thiamazole, Thomas Wharton (anatomist), Thyrocervical trunk, Thyroglobulin, Thyroglossal cyst, Thyroglossal duct, Thyroid adenoma, Thyroid cancer, Thyroid cartilage, Thyroid disease, Thyroid disease in pregnancy, Thyroid diverticulum, Thyroid dysgenesis, Thyroid function tests, Thyroid hormone receptor, Thyroid hormones, Thyroid ima artery, Thyroid lymphoma, Thyroid nodule, Thyroid peroxidase, Thyroid-stimulating hormone, Thyroidectomy, Thyroiditis, Thyroidologist, Thyrotropic cell, Thyrotropin-releasing hormone, Thyroxine-binding globulin, Tongue, Toxic multinodular goitre, Trachea, Transcription (biology), Transcription factor, Transthyretin, Triiodothyronine, Tunicate, Tyrosine, Ultimopharyngeal body, Vertebrate, Vitamin B12 deficiency anemia, Vitiligo, Vocal folds, William Stewart Halsted, Xenophon, Zuckerkandl's tubercle (thyroid gland). Expand index (233 more) »

'Ali ibn al-'Abbas al-Majusi

'Ali ibn al-'Abbas al-Majusi (died 982–994), also known as Masoudi, or Latinized as Haly Abbas, was a Persian physician and psychologist from the Islamic Golden Age, most famous for the Kitab al-Maliki or Complete Book of the Medical Art, his textbook on medicine and psychology.

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Aëtius of Amida

Aëtius of Amida (Ἀέτιος Ἀμιδηνός; Latin: Aëtius Amidenus; fl. mid-5th century to mid-6th century) was a Byzantine Greek physician and medical writer, particularly distinguished by the extent of his erudition.

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Acute infectious thyroiditis

Acute infectious thyroiditis (AIT) also known as suppurative thyroiditis, microbial inflammatory thyroiditis, pyrogenic thyroiditis and bacterial thyroiditis.

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Adam's apple

The Adam's apple, or laryngeal prominence, is a feature of the human neck, and is the lump or protrusion that is formed by the angle of the thyroid cartilage surrounding the larynx seen especially in males.

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Addison's disease

Addison's disease, also known as primary adrenal insufficiency and hypocortisolism, is a long-term endocrine disorder in which the adrenal glands do not produce enough steroid hormones.

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Adenylyl cyclase

Adenylyl cyclase (also commonly known as adenyl cyclase and adenylate cyclase, abbreviated AC) is an enzyme with key regulatory roles in essentially all cells.

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Alps

The Alps (Alpes; Alpen; Alpi; Alps; Alpe) are the highest and most extensive mountain range system that lies entirely in Europe,The Caucasus Mountains are higher, and the Urals longer, but both lie partly in Asia.

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Amiodarone

Amiodarone is an antiarrhythmic medication used to treat and prevent a number of types of irregular heartbeats.

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Amphibian

Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia.

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Amyloidosis

Amyloidosis is a group of diseases in which abnormal protein, known as amyloid fibrils, builds up in tissue.

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Anaplastic thyroid cancer

Anaplastic thyroid cancer (ATC) is a form of thyroid cancer which has a very poor prognosis due to its aggressive behavior and resistance to cancer treatments.

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Ancient Greek

The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.

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Andreas Vesalius

Andreas Vesalius (31 December 1514 – 15 October 1564) was a 16th-century Flemish anatomist, physician, and author of one of the most influential books on human anatomy, De humani corporis fabrica (On the Fabric of the Human Body).

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Andrew Schally

Andrzej Viktor "Andrew" Schally (born 30 November 1926) is an American endocrinologistAndrew V. Schally,, Encyclopædia Britannica.

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Angina

Angina, also known as angina pectoris, is chest pain or pressure, usually due to not enough blood flow to the heart muscle.

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Anterior pituitary

A major organ of the endocrine system, the anterior pituitary (also called the adenohypophysis or pars anterior), is the glandular, anterior lobe that together with the posterior lobe (posterior pituitary, or the neurohypophysis) makes up the pituitary gland (hypophysis).

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Antiarrhythmic agent

Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a group of pharmaceuticals that are used to suppress abnormal rhythms of the heart (cardiac arrhythmias), such as atrial fibrillation, atrial flutter, ventricular tachycardia, and ventricular fibrillation.

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Antiporter

An antiporter (also called exchanger or counter-transporter) is a cotransporter and integral membrane protein involved in secondary active transport of two or more different molecules or ions across a phospholipid membrane such as the plasma membrane in opposite directions.

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Apoptosis

Apoptosis (from Ancient Greek ἀπόπτωσις "falling off") is a process of programmed cell death that occurs in multicellular organisms.

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Aristotle

Aristotle (Ἀριστοτέλης Aristotélēs,; 384–322 BC) was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidiki, in the north of Classical Greece.

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Autoimmune disease

An autoimmune disease is a condition arising from an abnormal immune response to a normal body part.

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Autoimmunity

Autoimmunity is the system of immune responses of an organism against its own healthy cells and tissues.

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Axolotl

The axolotl (from āxōlōtl) also known as a Mexican salamander (Ambystoma mexicanum) or a Mexican walking fish, is a neotenic salamander, closely related to the tiger salamander.

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Ayurveda

Ayurveda is a system of medicine with historical roots in the Indian subcontinent.

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B cell

B cells, also known as B lymphocytes, are a type of white blood cell of the lymphocyte subtype.

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Basal metabolic rate

Basal metabolic rate (BMR) is the rate of energy expenditure per unit time by endothermic animals at rest.

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Bernard Courtois

Bernard Courtois, also spelled Barnard Courtois, (8 February 1777 – 27 September 1838) was a French chemist credited with first isolating iodine and morphine.

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Beta blocker

Beta blockers, also written β-blockers, are a class of medications that are particularly used to manage abnormal heart rhythms, and to protect the heart from a second heart attack (myocardial infarction) after a first heart attack (secondary prevention).

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Bile

Bile or gall is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that aids the digestion of lipids in the small intestine.

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Birth defect

A birth defect, also known as a congenital disorder, is a condition present at birth regardless of its cause.

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Bone

A bone is a rigid organ that constitutes part of the vertebrate skeleton.

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Brachiocephalic vein

The left and right brachiocephalic veins (or innominate veins) in the upper chest are formed by the union of each corresponding internal jugular vein and subclavian vein.

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Bradycardia

Bradycardia is a condition wherein an individual has a very slow heart rate, typically defined as a resting heart rate of under 60 beats per minute (BPM) in adults.

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Bruit

Bruit (from French, "noise"), or vascular murmur, is the abnormal sound generated by turbulent flow of blood in an artery due to either an area of partial obstruction; or a localized high rate of blood flow through an unobstructed artery.

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Calcitonin

Calcitonin (also known as thyrocalcitonin) is a 32-amino acid linear polypeptide hormone that is produced in humans primarily by the parafollicular cells (also known as C-cells) of the thyroid gland, and in many other animals in the ultimopharyngeal body.

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Calcitonin gene-related peptide

Calcitonin gene-related peptide (CGRP) is a member of the calcitonin family of peptides, which in humans exists in two forms, α-CGRP and β-CGRP.

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Calcium metabolism

Calcium metabolism refers to the movements and regulation of calcium ions (Ca2+) into and out of various body compartments, such as the gastrointestinal tract, the blood plasma, the extracellular and the intracellular fluid, and bone tissue.

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Carbimazole

Carbimazole is used to treat hyperthyroidism.

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Carcinoma

Carcinoma is a type of cancer that develops from epithelial cells.

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Carotid artery

Carotid artery may refer to.

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Cell biology

Cell biology (also called cytology, from the Greek κυτος, kytos, "vessel") is a branch of biology that studies the structure and function of the cell, the basic unit of life.

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Cell membrane

The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates the interior of all cells from the outside environment (the extracellular space).

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Charles Horace Mayo

Charles Horace Mayo (July 19, 1865 – May 26, 1939) was an American medical practitioner and was one of the founders of the Mayo Clinic along with his brother, William James Mayo, Augustus Stinchfield, Christopher Graham, E. Star Judd, Henry Stanley Plummer, Melvin Millet, and Donald Balfour.

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Chernobyl disaster

The Chernobyl disaster, also referred to as the Chernobyl accident, was a catastrophic nuclear accident.

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Childbirth

Childbirth, also known as labour and delivery, is the ending of a pregnancy by one or more babies leaving a woman's uterus by vaginal passage or C-section.

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Chinese language

Chinese is a group of related, but in many cases mutually unintelligible, language varieties, forming a branch of the Sino-Tibetan language family.

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Cholesterol

Cholesterol (from the Ancient Greek chole- (bile) and stereos (solid), followed by the chemical suffix -ol for an alcohol) is an organic molecule.

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Colloid

In chemistry, a colloid is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance.

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Colloid nodule

Colloid nodules, also known as adenomatous nodules or colloid nodular goiter are benign, noncancerous enlargement of thyroid tissue.

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Congenital hypothyroidism

Congenital hypothyroidism (CH) is a condition of thyroid hormone deficiency present at birth.

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Congenital iodine deficiency syndrome

Congenital iodine deficiency syndrome, previously known as Cretinism, is a condition of severely stunted physical and mental growth owing to untreated congenital deficiency of thyroid hormone (congenital hypothyroidism) usually owing to maternal hypothyroidism.

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Constipation

Constipation refers to bowel movements that are infrequent or hard to pass.

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Contemporary Latin

Contemporary Latin is the form of the Latin language used from the end of the 19th century through the present.

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Copula linguae

The copula linguae or copula, is a swelling that forms from the second pharyngeal arch, late in the fourth week of embryogenesis.

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Cricoid cartilage

The cricoid cartilage, or simply cricoid (from the Greek krikoeides meaning "ring-shaped") or cricoid ring, is the only complete ring of cartilage around the trachea.

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Cyst

A cyst is a closed sac, having a distinct membrane and division compared with the nearby tissue.

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David Marine

David Marine (20 September 1888 – 6 November 1976) was an American pathologist.

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Deiodinase

Deiodinase (or iodide peroxidase or "Monodeiodinase") is a peroxidase enzyme that is involved in the activation or deactivation of thyroid hormones.

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Diabetes mellitus type 1

Diabetes mellitus type 1, also known as type 1 diabetes, is a form of diabetes mellitus in which not enough insulin is produced.

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Diarrhea

Diarrhea, also spelled diarrhoea, is the condition of having at least three loose or liquid bowel movements each day.

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Diiodotyrosine

Diiodotyrosine (DIT) is a precursor in the production of thyroid hormone, and results from iodization of monoiodotyrosine at the other meta- position on the phenol ring.

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Dopamine

Dopamine (DA, a contraction of 3,4-dihydroxyphenethylamine) is an organic chemical of the catecholamine and phenethylamine families that plays several important roles in the brain and body.

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Ectopia (medicine)

An ectopia is a displacement or malposition of an organ or other body part, which is then referred to as ectopic.

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Emil Theodor Kocher

Emil Theodor Kocher (25 August 1841 – 27 July 1917) was a Swiss physician and medical researcher who received the 1909 Nobel Prize in Physiology or Medicine for his work in the physiology, pathology and surgery of the thyroid.

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Endemic goitre

Endemic goiter is a type of goitre that is associated with dietary iodine deficiency.

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Endocrine gland

Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.

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Endocrine Reviews

Endocrine Reviews is a bimonthly peer-reviewed academic journal for review articles in endocrinology published by the Endocrine Society.

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Endocrine system

The endocrine system is a chemical messenger system consisting of hormones, the group of glands of an organism that carry those hormones directly into the circulatory system to be carried towards distant target organs, and the feedback loops of homeostasis that the hormones drive.

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Endocrinology

Endocrinology (from endocrine + -ology) is a branch of biology and medicine dealing with the endocrine system, its diseases, and its specific secretions known as hormones.

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Endoplasmic reticulum

The endoplasmic reticulum (ER) is a type of organelle found in eukaryotic cells that forms an interconnected network of flattened, membrane-enclosed sacs or tube-like structures known as cisternae.

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Endostyle

The endostyle is an organ which assists lower-chordates (urochordates and cephalochordates, as well as the larvae of lampreys) in filter-feeding.

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Enzyme

Enzymes are macromolecular biological catalysts.

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Epithelium

Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue.

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Eugen Baumann

Eugen Baumann (12 December 1846 – 3 November 1896) was a German chemist.

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Evolution

Evolution is change in the heritable characteristics of biological populations over successive generations.

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Exocrine gland

Exocrine glands are glands that produce and secrete substances onto an epithelial surface by way of a duct.

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External carotid artery

The external carotid artery is a major artery of the head and neck.

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Family medicine

Family medicine (FM), formerly family practice (FP), is a medical specialty devoted to comprehensive health care for people of all ages; the specialist is named a family physician or family doctor.

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Fatty acid

In chemistry, particularly in biochemistry, a fatty acid is a carboxylic acid with a long aliphatic chain, which is either saturated or unsaturated.

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Fetus

A fetus is a stage in the prenatal development of viviparous organisms.

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Fine-needle aspiration

Fine-needle aspiration (FNA) is a diagnostic procedure used to investigate lumps or masses.

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Follicular cell

Follicular cells (also called thyroid epithelial cells or thyrocytes) are cells in the thyroid gland that are responsible for the production and secretion of thyroid hormones thyroxine (T4) and triiodothyronine (T3).

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Follicular thyroid cancer

Follicular thyroid cancer or follicular thyroid carcinoma accounts for 15% of thyroid cancer and occurs more commonly in women over 50 years of age.

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Frog

A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (Ancient Greek ἀν-, without + οὐρά, tail).

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Galen

Aelius Galenus or Claudius Galenus (Κλαύδιος Γαληνός; September 129 AD – /), often Anglicized as Galen and better known as Galen of Pergamon, was a Greek physician, surgeon and philosopher in the Roman Empire.

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General practitioner

In the medical profession, a general practitioner (GP) is a medical doctor who treats acute and chronic illnesses and provides preventive care and health education to patients.

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George Washington Crile

George Washington Crile (November 11, 1864, Chili, Ohio – January 7, 1943, Cleveland, Ohio) was an American surgeon.

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Gestational age

Gestational age is a measure of the age of a pregnancy which is taken from the woman's last menstrual period (LMP), or the corresponding age of the gestation as estimated by a more accurate method if available.

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Glucocorticoid

Glucocorticoids are a class of corticosteroids, which are a class of steroid hormones.

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Gluconeogenesis

Gluconeogenesis (GNG) is a metabolic pathway that results in the generation of glucose from certain non-carbohydrate carbon substrates.

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Glucose transporter

Glucose transporters are a wide group of membrane proteins that facilitate the transport of glucose across the plasma membrane.

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Glucose uptake

Method of glucose uptake differs throughout tissues depending on two factors; the metabolic needs of the tissue and availability of glucose.

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Glycolysis

Glycolysis (from glycose, an older term for glucose + -lysis degradation) is the metabolic pathway that converts glucose C6H12O6, into pyruvate, CH3COCOO− + H+.

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Glycoprotein

Glycoproteins are proteins that contain oligosaccharide chains (glycans) covalently attached to amino acid side-chains.

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Goitre

A goitre or goiter is a swelling in the neck resulting from an enlarged thyroid gland.

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Graves' disease

Graves' disease, also known as toxic diffuse goiter, is an autoimmune disease that affects the thyroid.

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Graves' ophthalmopathy

Graves ophthalmopathy (also known as thyroid eye disease (TED), dysthyroid/thyroid-associated orbitopathy (TAO), Graves' orbitopathy (GO)) is an autoimmune inflammatory disorder of the orbit and periorbital tissues, characterized by upper eyelid retraction, lid lag, swelling, redness (erythema), conjunctivitis, and bulging eyes (exophthalmos).

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Hakaru Hashimoto

was a Japanese medical scientist of the Meiji and Taishō periods.

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Hashimoto's thyroiditis

Hashimoto's thyroiditis, also known as chronic lymphocytic thyroiditis and Hashimoto's disease, is an autoimmune disease in which the thyroid gland is gradually destroyed.

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Histology

Histology, also microanatomy, is the study of the anatomy of cells and tissues of plants and animals using microscopy.

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Histopathology

Histopathology (compound of three Greek words: ἱστός histos "tissue", πάθος pathos "suffering", and -λογία -logia "study of") refers to the microscopic examination of tissue in order to study the manifestations of disease.

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Hormone

A hormone (from the Greek participle “ὁρμῶ”, "to set in motion, urge on") is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.

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Hormone response element

A hormone response element (HRE) is a short sequence of DNA within the promoter of a gene that is able to bind to a specific hormone receptor complex and therefore regulate transcription.

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Human embryogenesis

Human embryogenesis is the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development.

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Human variability

Human variability, or human variation, is the range of possible values for any characteristic, physical or mental, of human beings.

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Hyoid bone

The hyoid bone (lingual bone or tongue-bone) is a horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage.

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Hypercalcaemia

Hypercalcaemia, also spelled hypercalcemia, is a high calcium (Ca2+) level in the blood serum.

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Hyperthyroidism

Hyperthyroidism is the condition that occurs due to excessive production of thyroid hormone by the thyroid gland.

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Hypopharyngeal eminence

The hypopharyngeal eminence or hypobranchial eminence is a midline swelling of the third and fourth pharyngeal arches, in the development of the tongue.

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Hypothalamus

The hypothalamus(from Greek ὑπό, "under" and θάλαμος, thalamus) is a portion of the brain that contains a number of small nuclei with a variety of functions.

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Hypothyroidism

Hypothyroidism, also called underactive thyroid or low thyroid, is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormone.

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Inferior thyroid artery

The inferior thyroid artery is an artery in the neck.

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Inferior thyroid veins

The inferior thyroid veins appear two, frequently three or four, in number, and arise in the venous plexus on the thyroid gland, communicating with the middle and superior thyroid veins.

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Infrahyoid muscles

The infrahyoid muscles (strap muscles) are a group of four pairs of muscles in the anterior (frontal) part of the neck.

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Intellectual disability

Intellectual disability (ID), also known as general learning disability, and mental retardation (MR), is a generalized neurodevelopmental disorder characterized by significantly impaired intellectual and adaptive functioning.

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Internal jugular vein

The internal jugular vein is a paired jugular vein that collects blood from the brain and the superficial parts of the face and neck.

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Intracellular receptor

Intracellular receptors are receptors located inside the cell rather than on its cell membrane.

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Iodide

An iodide ion is the ion I−.

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Iodinated contrast

Iodinated contrast is a form of intravenous radiocontrast (radiographic dye) containing iodine, which enhances the visibility of vascular structures and organs during radiographic procedures.

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Iodine

Iodine is a chemical element with symbol I and atomic number 53.

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Iodine deficiency

Iodine deficiency is a lack of the trace element iodine, an essential nutrient in the diet.

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Iodine in biology

SBHarris 05:41, 26 July 2009 (UTC)--> Iodine is an essential trace element for life, the heaviest element commonly needed by living organisms, and the second-heaviest known to be used by any form of life (only tungsten, a component of a few bacterial enzymes, has a higher atomic number and atomic weight).

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Iodine-123

Iodine-123 (123I or I-123) is a radioactive isotope of iodine used in nuclear medicine imaging, including single photon emission computed tomography (SPECT) or SPECT/CT exams.

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Iodine-131

Iodine-131 (131I) is an important radioisotope of iodine discovered by Glenn Seaborg and John Livingood in 1938 at the University of California, Berkeley.

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Iodised salt

Iodised salt (also spelled iodized salt) is table salt mixed with a minute amount of various salts of the element iodine.

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Iodothyronine deiodinase

Iodothyronine deiodinases (and) are a subfamily of deiodinase enzymes important in the activation and deactivation of thyroid hormones.

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Iodotyrosine deiodinase

Iodotyrosine deiodinase, also known as iodotyrosine dehalogenase 1, is a type of deiodinase enzyme that scavenges iodide by removing it from iodinated tyrosine residues in the thyroid gland.

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Ion channel

Ion channels are pore-forming membrane proteins that allow ions to pass through the channel pore.

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Isotope

Isotopes are variants of a particular chemical element which differ in neutron number.

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Lamprey

Lampreys (sometimes also called, inaccurately, lamprey eels) are an ancient lineage of jawless fish of the order Petromyzontiformes, placed in the superclass Cyclostomata.

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Lancelet

The lancelets — also known as amphioxi (singular, amphioxus) consist of about 32 species of fish-like marine chordates in the order Amphioxiformes.

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Larynx

The larynx, commonly called the voice box, is an organ in the top of the neck of tetrapods involved in breathing, producing sound, and protecting the trachea against food aspiration.

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Leonardo da Vinci

Leonardo di ser Piero da Vinci (15 April 14522 May 1519), more commonly Leonardo da Vinci or simply Leonardo, was an Italian polymath of the Renaissance, whose areas of interest included invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography.

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Levator muscle of thyroid gland

A fibrous or muscular band is sometimes found attached, above, to the body of the hyoid bone, and below to the thyroid isthmus, or its pyramidal lobe.

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Levothyroxine

Levothyroxine, also known as -thyroxine, is a manufactured form of the thyroid hormone, thyroxine (T4).

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Lipolysis

Lipolysis is the breakdown of lipids and involves hydrolysis of triglycerides into glycerol and free fatty acids.

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List of anatomical isthmi

In anatomy, isthmus refers to a constriction between organs.

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Lithium

Lithium (from lit) is a chemical element with symbol Li and atomic number 3.

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Lobe (anatomy)

In anatomy, a lobe is a clear anatomical division or extension of an organ (as seen for example in the brain, the lung, liver or the kidney) that can be determined without the use of a microscope at the gross anatomy level.

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Lymph

Lymph is the fluid that circulates throughout the lymphatic system.

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Lymphocyte

A lymphocyte is one of the subtypes of white blood cell in a vertebrate's immune system.

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Mammal

Mammals are the vertebrates within the class Mammalia (from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands.

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Median tongue bud

The median tongue bud (also tuberculum impar) marks the beginning of the development of the tongue.

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Medical imaging

Medical imaging is the technique and process of creating visual representations of the interior of a body for clinical analysis and medical intervention, as well as visual representation of the function of some organs or tissues (physiology).

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Medical ultrasound

Medical ultrasound (also known as diagnostic sonography or ultrasonography) is a diagnostic imaging technique based on the application of ultrasound.

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Medullary thyroid cancer

Medullary thyroid cancer (MTC) is a form of thyroid carcinoma which originates from the parafollicular cells (C cells), which produce the hormone calcitonin.

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Menorrhagia

Menorrhagia is a menstrual period with excessively heavy flow and falls under the larger category of abnormal uterine bleeding (AUB).

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Menstrual cycle

The menstrual cycle is the regular natural change that occurs in the female reproductive system (specifically the uterus and ovaries) that makes pregnancy possible.

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Metabolism

Metabolism (from μεταβολή metabolē, "change") is the set of life-sustaining chemical transformations within the cells of organisms.

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Metamorphosis

Metamorphosis is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation.

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Metastasis

Metastasis is a pathogenic agent's spread from an initial or primary site to a different or secondary site within the host's body; it is typically spoken of as such spread by a cancerous tumor.

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Middle thyroid vein

The middle thyroid vein (vena thyreoidea media) collects the blood from the lower part of the thyroid gland, and after being joined by some veins from the larynx and trachea, ends in the lower part of the internal jugular vein.

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Minimally invasive procedures

Minimally invasive procedures (also known as minimally invasive surgeries) encompass surgical techniques that limit the size of incisions needed and so lessen wound healing time, associated pain and risk of infection.

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Mitochondrion

The mitochondrion (plural mitochondria) is a double-membrane-bound organelle found in most eukaryotic organisms.

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Monoiodotyrosine

Monoiodotyrosine is a precursor of thyroid hormone and results from halogenation of tyrosine at the meta-position of the benzene ring.

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Myxedema

Myxedema or myxoedema is a term used synonymously with severe hypothyroidism.

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Myxedema coma

Myxedema coma is a state of decompensated hypothyroidism.

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Neck

The neck is the part of the body, on many vertebrates, that separates the head from the torso.

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Negative feedback

Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.

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Neoteny

Neoteny, (also called juvenilization)Montagu, A. (1989).

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Neural crest

Neural crest cells are a temporary group of cells unique to chordates of the group Cristozoa that arise from the embryonic ectoderm cell layer, and in turn give rise to a diverse cell lineage—including melanocytes, craniofacial cartilage and bone, smooth muscle, peripheral and enteric neurons and glia.

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Neurodevelopmental disorder

Neurodevelopmental disorder is a mental disorder.

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Neuroendocrine cell

Neuroendocrine cells are cells that receive neuronal input (neurotransmitters released by nerve cells or neurosecretory cells) and, as a consequence of this input, release message molecules (hormones) to the blood.

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Newborn screening

Newborn screening is a public health program of screening in infants shortly after birth for a list of conditions that are treatable, but not clinically evident in the newborn period.

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Nobel Prize in Physiology or Medicine

The Nobel Prize in Physiology or Medicine (Nobelpriset i fysiologi eller medicin), administered by the Nobel Foundation, is awarded once a year for outstanding discoveries in the fields of life sciences and medicine.

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Nuclear fission

In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei).

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Nuclear receptor

In the field of molecular biology, nuclear receptors are a class of proteins found within cells that are responsible for sensing steroid and thyroid hormones and certain other molecules.

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Osteoblast

Osteoblasts (from the Greek combining forms for "bone", ὀστέο-, osteo- and βλαστάνω, blastanō "germinate") are cells with a single nucleus that synthesize bone.

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Osteoclast

An osteoclast is a type of bone cell that breaks down bone tissue.

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Otorhinolaryngology

Otorhinolaryngology (also called otolaryngology and otolaryngology–head and neck surgery) is a surgical subspecialty within medicine that deals with conditions of the ear, nose, and throat (ENT) and related structures of the head and neck.

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Palpation

Palpation is the process of using one's hands to check the body, especially while perceiving/diagnosing a disease or illness.

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Palpation thyroiditis

Palpation thyroiditis refers to the development of thyroid inflammation due to mechanical damage to thyroid follicles.

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Palpitations

Palpitations are the perceived abnormality of the heartbeat characterized by awareness of cardiac muscle contractions in the chest: hard, fast and/or irregular beats.

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Papillary thyroid cancer

Papillary thyroid cancer or papillary thyroid carcinoma is the most common type of thyroid cancer, representing 75 percent to 85 percent of all thyroid cancer cases.

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Parafollicular cell

Parafollicular cells (also called C cells) are neuroendocrine cells in the thyroid which primary function is to secrete calcitonin.

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Parasympathetic nervous system

The parasympathetic nervous system (PSNS) is one of the two divisions of the autonomic nervous system (a division of the peripheral nervous system (PNS)), the other being the sympathetic nervous system.

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Parathyroid gland

Parathyroid glands are small endocrine glands in the neck of humans and other tetrapods that produce parathyroid hormone.

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Parathyroid hormone

Parathyroid hormone (PTH), also called parathormone or parathyrin, is a hormone secreted by the parathyroid glands that is important in bone remodeling, which is an ongoing process in which bone tissue is alternately resorbed and rebuilt over time.

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Paratracheal lymph nodes

The right and left paratracheal lymph nodes (or paratracheal chains) are groups of lymph nodes located in the throat.

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Pathognomonicity

Pathognomonic (rarely spelled pathognomic and sometimes misspelled as pathomnemonic) is a term, often used in medicine, that means characteristic for a particular disease.

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Pemberton's sign

Pemberton's sign was named after Dr.

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Pendrin

Pendrin, is an anion exchange protein that in humans is encoded by the SLC26A4 gene (solute carrier family 26, member 4).

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Peptide hormone

Peptide hormones or protein hormones are hormones whose molecules are peptides or proteins, respectively.

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Percussion (medicine)

Percussion is a method of tapping on a surface to determine the underlying structure, and is used in clinical examinations to assess the condition of the thorax or abdomen.

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Persistent thyroglossal duct

A persistent thyroglossal duct is a usually benign medical condition in which the thyroglossal duct, a structure usually only found during embryonic development, fails to atrophy.

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Pharyngeal arch

The pharyngeal arches —also known as visceral arches—are structures seen in the embryonic development of vertebrates that are recognisable precursors for many structures.

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Pharyngeal pouch (embryology)

In the embryonic development of vertebrates, pharyngeal pouches form on the endodermal side between the pharyngeal arches.

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Pierre Lalouette

Pierre Lalouette de Vernicourt (1711 - 1792) was a distinguished French anatomist.

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Pituitary adenoma

Pituitary adenomas are tumors that occur in the pituitary gland.

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Pituitary gland

An explanation of the development of the pituitary gland (Hypophysis cerebri) & the congenital anomalies. In vertebrate anatomy, the pituitary gland, or hypophysis, is an endocrine gland about the size of a pea and weighing in humans.

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Plasma membrane Ca2+ ATPase

The plasma membrane Ca2+ ATPase (PMCA) is a transport protein in the plasma membrane of cells and functions to remove calcium (Ca2+) from the cell.

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Pliny the Elder

Pliny the Elder (born Gaius Plinius Secundus, AD 23–79) was a Roman author, naturalist and natural philosopher, a naval and army commander of the early Roman Empire, and friend of emperor Vespasian.

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Postpartum thyroiditis

Postpartum thyroiditis is a phenomenon observed following pregnancy and may involve hyperthyroidism, hypothyroidism or the two sequentially.

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Prelaryngeal lymph nodes

Prelaryngeal lymph nodes are lymph nodes located anterior to the larynx.

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Prenatal development

Prenatal development is the process in which an embryo and later fetus develops during gestation.

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Pretracheal fascia

The pretracheal fascia extends medially in front of the carotid vessels, and assists in forming the carotid sheath.

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Pretracheal lymph nodes

The pretracheal lymph nodes are lymph nodes located anterior to the trachea.

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Prevalence

Prevalence in epidemiology is the proportion of a particular population found to be affected by a medical condition (typically a disease or a risk factor such as smoking or seat-belt use).

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Propylthiouracil

Propylthiouracil (PTU) is a medication used to treat hyperthyroidism.

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Protein

Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues.

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Protein biosynthesis

Protein synthesis is the process whereby biological cells generate new proteins; it is balanced by the loss of cellular proteins via degradation or export.

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Psychic

A psychic is a person who claims to use extrasensory perception (ESP) to identify information hidden from the normal senses, particularly involving telepathy or clairvoyance, or who performs acts that are apparently inexplicable by natural laws.

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Radioactive decay

Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron in the case of internal conversion.

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Radioactive iodine uptake test

The radioactive iodine uptake test, or RAIU test, is a type of scan used in the diagnosis of thyroid problems, particularly hyperthyroidism.

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Radiofrequency ablation

Radiofrequency ablation (RFA) is a medical procedure in which part of the electrical conduction system of the heart, tumor or other dysfunctional tissue is ablated using the heat generated from medium frequency alternating current (in the range of 350–500 kHz).

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Recurrent laryngeal nerve

The recurrent laryngeal nerve (RLN) is a branch of the vagus nerve (cranial nerve X) that supplies all the intrinsic muscles of the larynx, with the exception of the cricothyroid muscles.

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Redox

Redox (short for reduction–oxidation reaction) (pronunciation: or) is a chemical reaction in which the oxidation states of atoms are changed.

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Renaissance

The Renaissance is a period in European history, covering the span between the 14th and 17th centuries.

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Reverse triiodothyronine

Reverse triiodothyronine (3,3’,5’-triiodothyronine, reverse T3, or rT3) is an isomer of triiodothyronine (3,5,3’ triiodothyronine, T3).

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Riedel's thyroiditis

Riedel's thyroiditis, also called Riedel's struma is a chronic form of thyroiditis.

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Risk factor

In epidemiology, a risk factor is a variable associated with an increased risk of disease or infection.

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Robert James Graves

Robert James Graves, F.R.C.S. (27 March 1796 – 20 March 1853) was an eminent Irish surgeon after whom Graves' disease takes its name.

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Salamander

Salamanders are a group of amphibians typically characterized by a lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults.

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Salt

Salt, table salt or common salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in its natural form as a crystalline mineral is known as rock salt or halite.

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Sarcoidosis

Sarcoidosis is a disease involving abnormal collections of inflammatory cells that form lumps known as granulomas.

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Septum

In biology, a septum (Latin for something that encloses; plural septa) is a wall, dividing a cavity or structure into smaller ones.

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Serum albumin

Serum albumin, often referred to simply as blood albumin, is an albumin (a type of globular protein) found in vertebrate blood.

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Sodium-iodide symporter

A sodium/iodide symporter (NIS), also known as a sodium/iodide cotransporter or solute carrier family 5, member 5 (SLC5A5) is a protein that in humans is encoded by the SLC5A5 gene.

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Somatostatin

Somatostatin, also known as growth hormone-inhibiting hormone (GHIH) or by several other names, is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation via interaction with G protein-coupled somatostatin receptors and inhibition of the release of numerous secondary hormones.

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Sternocleidomastoid muscle

The sternocleidomastoid muscle (also known as sternomastoid, commonly abbreviated as SCM or simply referred to as sterno muscle), is a paired muscle in the superficial layers of the side of the neck.

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Stethoscope

The stethoscope is an acoustic medical device for auscultation, or listening to the internal sounds of an animal or human body.

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Stratified squamous epithelium

A stratified squamous epithelium consists of squamous (flattened) epithelial cells arranged in layers upon a basal membrane.

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Subacute lymphocytic thyroiditis

Subacute lymphocytic thyroiditis is a form of thyroiditis that is also known as silent thyroiditis or painless thyroiditis.

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Subacute thyroiditis

Subacute thyroiditis is a form of thyroiditis that can be a cause of both thyrotoxicosis and hypothyroidism.

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Superinfection

A superinfection is a second infection superimposed on an earlier one, especially by a different microbial agent of exogenous or endogenous origin, that is resistant to the treatment being used against the first infection.

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Superior laryngeal nerve

The superior laryngeal nerve is a branch of the vagus nerve.

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Superior thyroid artery

The superior thyroid artery arises from the external carotid artery just below the level of the greater cornu of the hyoid bone and ends in the thyroid gland.

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Superior thyroid vein

The superior thyroid vein begins in the substance and on the surface of the thyroid gland, by tributaries corresponding with the branches of the superior thyroid artery, and ends in the upper part of the internal jugular vein.

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Sushruta Samhita

The Sushruta Samhita (सुश्रुतसंहिता, IAST: Suśrutasaṃhitā, literally "Suśruta's Compendium") is an ancient Sanskrit text on medicine and surgery, and one of the most important such treatises on this subject to survive from the ancient world.

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Suspensory ligament of thyroid gland

The suspensory ligament of the thyroid gland, or Berry's ligament, is a suspensory ligament that passes from the thyroid gland to the trachea.

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Sympathetic nervous system

The sympathetic nervous system (SNS) is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system.

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Sympathetic trunk

The sympathetic trunks (sympathetic chain, gangliated cord) are a paired bundle of nerve fibers that run from the base of the skull to the coccyx.

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T cell

A T cell, or T lymphocyte, is a type of lymphocyte (a subtype of white blood cell) that plays a central role in cell-mediated immunity.

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Tadpole

A tadpole (also called a pollywog) is the larval stage in the life cycle of an amphibian, particularly that of a frog or toad.

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Technetium-99

Technetium-99 (99Tc) is an isotope of technetium which decays with a half-life of 211,000 years to stable ruthenium-99, emitting beta particles, but no gamma rays.

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Teleost

The teleosts or Teleostei (Greek: teleios, "complete" + osteon, "bone") are by far the largest infraclass in the class Actinopterygii, the ray-finned fishes, and make up 96% of all extant species of fish.

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Tetrapod

The superclass Tetrapoda (from Greek: τετρα- "four" and πούς "foot") contains the four-limbed vertebrates known as tetrapods; it includes living and extinct amphibians, reptiles (including dinosaurs, and its subgroup birds) and mammals (including primates, and all hominid subgroups including humans), as well as earlier extinct groups.

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Theodor Billroth

Christian Albert Theodor Billroth (26 April 18296 February 1894) was a Prussian-born Austrian surgeon and amateur musician.

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Thermogenesis

Thermogenesis is the process of heat production in organisms.

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Thiamazole

Thiamazole, also known as methimazole, is an antithyroid drug, and part of the thioamide group.

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Thomas Wharton (anatomist)

Thomas Wharton (1614–1673) was an English physician and anatomist best known for his descriptions of the submandibular duct (one of the salivary ducts) and Wharton's jelly of the umbilical cord.

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Thyrocervical trunk

The thyrocervical trunk is a branch of the subclavian artery arising from the first portion of this vessel, i.e. between the origin of the subclavian artery and the inner border of the scalenus anterior muscle.

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Thyroglobulin

Thyroglobulin (Tg) is a 660 kDa, dimeric protein produced by the follicular cells of the thyroid and used entirely within the thyroid gland.

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Thyroglossal cyst

A thyroglossal cyst is a fibrous cyst that forms from a persistent thyroglossal duct.

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Thyroglossal duct

The thyroglossal duct is an embryological anatomical structure forming an open connection between the initial area of development of the thyroid gland and its final position. It is located exactly mid-line, between the anterior 2/3 and posterior 1/3 of the tongue. The thyroid gland starts developing in the oropharynx in the fetus and descends to its final position taking a path through the tongue, hyoid bone and neck muscles. The connection between its original position and its final position is the thyroglossal duct. This duct normally atrophies and closes off as the foramen cecum before birth but can remain open in some people.

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Thyroid adenoma

A thyroid adenoma is a benign tumor of the thyroid gland.

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Thyroid cancer

Thyroid cancer is cancer that develops from the tissues of the thyroid gland.

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Thyroid cartilage

The thyroid cartilage is the largest of the nine cartilages that make up the laryngeal skeleton, the cartilage structure in and around the trachea that contains the larynx.

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Thyroid disease

Thyroid disease is a medical condition that affects the function of the thyroid gland (the endocrine organ found at the front of the neck that produces thyroid hormones).

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Thyroid disease in pregnancy

Thyroid disease in pregnancy can affect the health of the mother as well as the child before and after delivery.

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Thyroid diverticulum

The thyroid pouch or thyroid diverticulum is the embryological structure of the second pharyngeal arch from which thyroid follicular cells derive.

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Thyroid dysgenesis

Thyroid dysgenesis or thyroid agenesis is a cause of congenital hypothyroidism where the thyroid is missing, ectopic, or severely underdeveloped.

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Thyroid function tests

Thyroid function tests (TFTs) is a collective term for blood tests used to check the function of the thyroid.

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Thyroid hormone receptor

The thyroid hormone receptor (TR) is a type of nuclear receptor that is activated by binding thyroid hormone.

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Thyroid hormones

Thyroid hormones are two hormones produced and released by the thyroid gland, namely triiodothyronine (T3) and thyroxine (T4).

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Thyroid ima artery

The thyroid ima artery (thyroidea ima artery, arteria thyroidea ima, thyroid artery of Neubauer or the lowest thyroid artery) is an artery of the head and neck.

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Thyroid lymphoma

Thyroid lymphoma is a rare malignant tumor constituting 1% to 2% of all thyroid malignancies and less than 2% of lymphomas.

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Thyroid nodule

Thyroid nodules are nodules (raised areas of tissue or fluid) which commonly arise within an otherwise normal thyroid gland.

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Thyroid peroxidase

Thyroid peroxidase, also called thyroperoxidase (TPO) or iodide peroxidase, is an enzyme expressed mainly in the thyroid where it is secreted into colloid.

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Thyroid-stimulating hormone

Thyroid-stimulating hormone (also known as thyrotropin, thyrotropic hormone, TSH, or hTSH for human TSH) is a pituitary hormone that stimulates the thyroid gland to produce thyroxine (T4), and then triiodothyronine (T3) which stimulates the metabolism of almost every tissue in the body.

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Thyroidectomy

A thyroidectomy is an operation that involves the surgical removal of all or part of the thyroid gland.

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Thyroiditis

Thyroiditis is the inflammation of the thyroid gland.

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Thyroidologist

A thyroidologist is a medical practitioner specializing in the thyroid and related areas.

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Thyrotropic cell

Thyrotropes (also called thyrotrophs) are endocrine cells in the anterior pituitary which produce thyroid stimulating hormone (TSH) in response to thyrotropin releasing hormone (TRH).

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Thyrotropin-releasing hormone

Thyrotropin-releasing hormone (TRH), also called thyrotropin-releasing factor (TRF) or thyroliberin, is a releasing hormone, produced by the hypothalamus, that stimulates the release of thyrotropin (thyroid-stimulating hormone or TSH) and prolactin from the anterior pituitary.

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Thyroxine-binding globulin

Thyroxine-binding globulin (TBG) is a globulin that binds thyroid hormones in circulation.

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Tongue

The tongue is a muscular organ in the mouth of most vertebrates that manipulates food for mastication, and is used in the act of swallowing.

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Toxic multinodular goitre

Toxic multinodular goiter (also known as toxic nodular goiter, or Plummer's disease) is a multinodular goiter associated with hyperthyroidism.

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Trachea

The trachea, colloquially called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs.

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Transcription (biology)

Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (especially mRNA) by the enzyme RNA polymerase.

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Transcription factor

In molecular biology, a transcription factor (TF) (or sequence-specific DNA-binding factor) is a protein that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence.

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Transthyretin

Transthyretin (TTR) is a transport protein in the serum and cerebrospinal fluid that carries the thyroid hormone thyroxine (T4) and retinol-binding protein bound to retinol.

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Triiodothyronine

Triiodothyronine, also known as T3, is a thyroid hormone.

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Tunicate

A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata, which is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords.

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Tyrosine

Tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins.

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Ultimopharyngeal body

The ultimopharyngeal body or ultimobranchial body or ultimobranchial gland is a small organ found in the neck region of many animals.

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Vertebrate

Vertebrates comprise all species of animals within the subphylum Vertebrata (chordates with backbones).

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Vitamin B12 deficiency anemia

Vitamin B12 deficiency anemia, of which pernicious anemia is a type, is a disease in which not enough red blood cells are produced due to a deficiency of vitamin B12.

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Vitiligo

Vitiligo is a long-term skin condition characterized by patches of the skin losing their pigment.

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Vocal folds

The vocal folds, also known commonly as vocal cords or voice reeds, are composed of twin infoldings of mucous membrane stretched horizontally, from back to front, across the larynx.

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William Stewart Halsted

William Stewart Halsted, M.D. (September 23, 1852 – September 7, 1922) was an American surgeon who emphasized strict aseptic technique during surgical procedures, was an early champion of newly discovered anesthetics, and introduced several new operations, including the radical mastectomy for breast cancer.

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Xenophon

Xenophon of Athens (Ξενοφῶν,, Xenophōn; – 354 BC) was an ancient Greek philosopher, historian, soldier, mercenary, and student of Socrates.

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Zuckerkandl's tubercle (thyroid gland)

Zuckerkandl's tubercle is a pyramidal extension of the thyroid gland, present at the most posterior side of each lobe.

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References

[1] https://en.wikipedia.org/wiki/Thyroid

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