| MAP | malignant atrophic papulosis; mandibular angle plane; maturation-activated protein; maximal aerobic ... |
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| MCS | malignant carcinoid syndrome; managed care system; massage of the carotid sinus; mesocaval shunt; me... |
| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
| MEO | malignant external otitis |
| MFH | malignant fibrous histiocytoma |
| desmoplastic malignant melanoma | <tumour> A melanoma with marked fibrosis surrounding atypical spindle-shaped melanocytes in the dermis. (05 Mar 2000) |
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| low malignant potential tumour | A neoplasm of the ovary, usually arising in young women, composed of complex epithelial hyperplasia without stromas invasion; may recur if incompletely removed surgically, but is clinically less aggressive than carcinoma. Synonym: low malignant potential tumour. (05 Mar 2000) |
| acidophil adenoma | <endocrinology, oncology, tumour> A benign tumour, usually found in the anterior lobe of the pituitary gland, whose cells stain with acid dyes. Such pituitary tumours may give rise to excessive secretion of growth hormone, resulting in gigantism or acromegaly. A specific type of acidophil adenoma may give rise to nonpuerperal galactorrhoea. (25 Jun 1999) |
| ACTH-producing adenoma | <tumour> A pituitary tumour composed of corticotrophs that produce ACTH, often a basophilic adenoma; may give rise to Cushing's disease or Nelson's syndrome. (05 Mar 2000) |
| adenoma | <oncology, tumour> A benign epithelial tumour in which the cells form recognisable glandular structures or in which the cells are clearly derived from glandular epithelium. (18 Nov 1997) |
| adenoma, adrenal cortical | A benign neoplasm of adrenal cortical cells resembling normal adrenal cells histologically but possessing functional autonomy. In general it does not exceed 5 cm in its largest dimension, although benign tumours exceeding 20 cm have been reported. Adrenal cortical adenomas produce hypercortisolism and hyperaldosteronism, but seldom produce adrenogenital syndromes. For the most part the prognosis after surgery is reasonably favourable. (12 Dec 1998) |
| adenoma, basophil | A small tumour of the anterior lobe of the pituitary gland whose cells stain with basic dyes. It may give rise to excessive secretion of acth, resulting in cushing's syndrome. (12 Dec 1998) |
| adenoma, bile duct | A benign tumour of the intrahepatic bile ducts. (12 Dec 1998) |
| adenoma, chromophobe | A tumour of the anterior lobe of the pituitary gland whose cells do not stain readily with either acid or basic dyes and whose presence may be associated with hypopituitarism. Although classically these adenomas have been said to be composed of sparsely granulated or degranulated (nonfunctioning) cells, some contain functioning cells and may be associated with a hyperpituitary state, e.g., acromegaly or cushing's syndrome. (12 Dec 1998) |
| adenoma fibrosum | <oncology, tumour> A benign solid growth, usually found in the breast. (09 Oct 1997) |
| adenoma, islet cell | A benign tumour of the islets of langerhans that may occur anywhere throughout the pancreas. Such tumours may result in hyperinsulinism or zollinger-ellison syndrome. (12 Dec 1998) |
| adenoma, liver cell | A benign epithelial tumour of the liver. (12 Dec 1998) |
| adenoma of nipple | A benign tumour which may clinically resemble Paget's disease, but which is a papillary or solid growth of columnar and myoepithelial cells producing a florid pseudoinfiltrative pattern. Synonym: adenoma of nipple, erosive adenomatosis of nipple. (05 Mar 2000) |
| adenoma, oxyphilic | A usually benign adenoma composed of oncocytes with granular, eosinophilic cytoplasm due to the presence of abundant mitochondria. It is often composed of huerthle cells found in the thyroid. It occurs uncommonly in the kidney, salivary glands, and endocrine glands. (12 Dec 1998) |
| adenoma, pleomorphic | A benign, slow-growing tumour, most commonly of the salivary gland, occurring as a small, painless, firm nodule, usually of the parotid gland, but also found in any major or accessory salivary gland anywhere in the oral cavity. It is most often seen in women in the fifth decade. Histologically, the tumour presents a variety of cells: cuboidal, columnar, and squamous cells, showing all forms of epithelial growth. (12 Dec 1998) |