| MAD | major affective disorder; mandibulo-acral dysplasia; maximum allowable dose; methylandrostenediol; m... |
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| MAFD | manic affective disorder |
| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
| MDD | major depressive disorder; mean daily dose |
| MPD | main pancreatic duct; maximum permissible dose; mean population doubling; membrane potential differe... |
| retroviruses type d, simian | Type d retroviruses that cause simian acquired immunodeficiency syndrome (saids) and malignancies in monkeys. at least five serotypes of srv are recognised: srv-1, srv-2 (retrovirus-d/new england), srv-3 (mason-pfiser monkey virus), srv-4, and srv-5. Subcutaneous fibrosarcoma is associated with srv-1 infection and retroperitoneal fibromatosis is associated with srv-2 infection. (12 Dec 1998) |
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| childhood type tuberculosis | First infection by Mycobacterium tuberculosis, typically seen in children but also occurs in adults, characterised in the lungs by the formation of a primary complex consisting of small peripheral pulmonary focus with spread to hilar or paratracheal lymph nodes; may cavitate or heal with scarring or may progress. Synonym: childhood type tuberculosis. (05 Mar 2000) |
| pernicious anaemia type rubriblast | The earliest of four maturation stages of the megaloblast. See: erythroblast. Synonym: pernicious anaemia type rubriblast. (05 Mar 2000) |
| river-type fish | <marine biology> Anadromous fish that rear for a year or more in rivers. (23 Aug 1998) |
| Romanovsky type stain | <technique> Composite histological stains including methylene blue, Azure A or B and eosin, sometimes with other stains. Examples are Giemsa, Wright's and Leishman's stain. (18 Nov 1997) |
| wild type | <genetics> The naturally-occuring, normal, non-mutated version of a gene. The original parent strain of a virus, bacteria, fruit fly, mouse, or other laboratory test organism. Often refers to how organisms are found naturally, in the wild, before mutations were induced by researchers. (09 Oct 1997) |
| wild-type strain | A strain found in nature or a standard strain. See: auxotrophic strains, prototrophic strains. (05 Mar 2000) |
| MPGN type i | A kidney disorder which results in kidney dysfunction. Inflammation of the glomeruli result from an abnormal immune response and the deposition of antibodies within the kidney (glomerulus) ultrastructure. Membranoproliferative glomerulonephritis (MPGN) has been divided into two different types in the basis of where the antibodies are deposited in the glomerulus. MPGN type I, the more common type, deposits antibodies in the subendothelial layer of the basement membrane, whereas type II deposits antibodies in the bottom layer of the basement membrane. Symptoms include cloudy urine (pyuria), decreased urine output, swelling and hypertension. This disorder often results in end-stage renal disease. (27 Sep 1997) |
| mpgn type II | A kidney disorder which results in kidney dysfunction. Inflammation of the glomeruli result from an abnormal immune response and the deposition of antibodies within the kidney (glomerulus) ultrastructure. Membranoproliferative glomerulonephritis (MPGN) has been divided into two different types in the basis of where the antibodies are deposited in the glomerulus. MPGN type I, the more common type, deposits antibodies in the subendothelial layer of the basement membrane, whereas type II deposits antibodies in the bottom layer of the basement membrane. Symptoms include cloudy urine (pyuria), decreased urine output, swelling and hypertension. This disorder often results in end-stage renal disease. (27 Sep 1997) |
| woodbury-type | 1. A process in photographic printing, in which a relief pattern in gelatin, which has been hardened after certain operations, is pressed upon a plate of lead or other soft metal. An intaglio impression in thus produced, from which pictures may be directly printed, but by a slower process than in common printing. 2. A print from such a plate. Origin: After the name of the inventor, W. Woodbury. Source: Websters Dictionary (01 Mar 1998) |
| multiple endocrine neoplasia type 1 | A rare syndrome characterised by hyperplasia and/or neoplasms of the pituitary, parathyroid glands, and pancreatic islets. Hyperparathyroidism occurs in 90% of the cases and is usually the first manifestation of the syndrome. The most frequent pancreatic manifestation is gastrinoma typically leading to zollinger-ellison syndrome. The appearance of this condition has been limited to the loss of allelic heterozygosity at the 11q13 locus on the long arm of chromosome 11. Patients overall exhibit long survival times. Chemotherapy is rare and surgical management is generally dependent on the genetic expression in individual patients. (12 Dec 1998) |
| multiple endocrine neoplasia type 2 | <syndrome> This is a hereditary disorder in which two or more of the following glands: thyroid, adrenal or parathyroid, develop overgrowth (hyperplasia) or malignant cells (cancer). The underlying cause is genetic and a positive family history for this illness is a risk factor. Incidence: approximately 3 in 100,000 people in the general population. (27 Sep 1997) |
| multiple endocrine neoplasia type 2a | A type of multiple endocrine neoplasia characterised by a virtually 100% incidence of medullary thyroid carcinoma, a 50% incidence of pheochromocytoma, and a lesser incidence of parathyroid adenomas associated with hyperparathyroidism. The condition is always transmitted through autosomal dominant inheritance. Genetic testing can identify individuals with the trait in early infancy. Treatment is usually excision of the enlarged parathyroid glands. (12 Dec 1998) |
| multiple endocrine neoplasia type 2b | A type of multiple endocrine neoplasia occurring as an isolated congenital presentation or as a distinct autosomal dominant disease. It is characterised by the 100% incidence of medullary thyroid carcinoma and frequent pheochromocytomas; patients seldom exhibit hyperparathyroidism. It is distinguished from men 2a by its characteristic physical appearance resulting from numerous neural defects including mucosal neuromas of the eyelids, lips, and tongue. The neural abnormalities also include widespread neurogangliomatosis of the gastrointestinal tract leading to abnormal gut motility. Treatment usually requires total thyroidectomy following evaluation for the presence of pheochromocytomas. (12 Dec 1998) |
| multiple lipoprotein-type hyperlipidaemia | <biochemistry> Inherited as a defective gene, this disorder is characterised by elevations in serum cholesterol and/or triglycerides. There are often multiple types of lipoproteins (LDL) elevated in one family. This condition is associated with an increased risk of cardiovascular disease. Origin: Gr. Haima = blood (27 Sep 1997) |