| malign | 1. Having an evil disposition toward others; harboring violent enmity; malevolent; malicious; spiteful; opposed to benign. "Witchcraft may be by operation of malign spirits." (Bacon) 2. Unfavorable; unpropitious; pernicious; tending to injure; as, a malign aspect of planets. 3. Malignant; as, a malign ulcer. Origin: L. Malignus, for maligenus, i. E, of a bad kind or nature; malus bad + the root of genus birth, race, kind: cf. F. Malin, masc, maligne, fem. See Malice, Gender, and cf. Benign, Malignant. Source: Websters Dictionary (01 Mar 1998) |
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| malignancy | (pl. Malignancies) a cancer. (16 Dec 1997) |
| malignancy and immunodeficiency | <radiology> High risk of malignancy (especially lymphoma/leukaemia, GI tumours): X-linked agammaglobulinaemia (Bruton's), common variable immunodeficiency, severe combined immunodeficiency (SCID kids), ataxia-telangectasia, Wiscott-Aldrich syndrome, selective IgA deficiency (12 Dec 1998) |
| malignant | <oncology> Tending to become progressively worse and to result in death. Having the properties of anaplasia, invasion and metastasis, said of tumours. Origin: L. Malignans = acting maliciously (18 Nov 1997) |
| malignant anaemia | <haematology> A form of anaemia (low red blood cell counts) that results when the bone marrow fails to produce adequate numbers of red blood cells due to a deficiency in vitamin B12. Intrinsic factor, necessary for normal B12 absorption, may be the underlying cause for B12 deficiency if is not produced in the gastric glands (in the stomach). Origin: Gr. Haima = blood (27 Sep 1997) |
| malignant carcinoid syndrome | <syndrome> A symptom complex associated with carcinoid tumour and characterised by attacks of severe flushing of the skin, diarrhoeal watery stools, bronchoconstriction, sudden drops in blood pressure, oedema, and ascites. The carcinoid tumours are usually located in the gastrointestinal tract and metastasize to the liver. Symptoms are caused by tumour secretion of serotonin, prostaglandins, and other biologically active substances. Cardiac manifestations constitute carcinoid heart disease. (12 Dec 1998) |
| malignant catarrh | A herpes virus infection of cattle characterised by catarrhal inflammation of the upper respiratory and alimentary epithelia, keratoconjunctivitis, encephalitis and lymph node enlargement. Syn: bovine epitheliosis, snotsiekte. (12 Dec 1998) |
| malignant catarrh of cattle | A highly fatal, sporadic disease of cattle caused by alcelaphine herpesvirus 1 (a member of the Herpesviridae family) and characterised by inflammation, ulceration, and exudation of the oral and upper respiratory mucous membranes, and sometimes eye lesions and nervous system disturbances. Synonym: malignant catarrh of cattle. (05 Mar 2000) |
| malignant catarrhal fever | A highly fatal, sporadic disease of cattle caused by alcelaphine herpesvirus 1 (a member of the Herpesviridae family) and characterised by inflammation, ulceration, and exudation of the oral and upper respiratory mucous membranes, and sometimes eye lesions and nervous system disturbances. Synonym: malignant catarrh of cattle. (05 Mar 2000) |
| malignant catarrhal fever virus | A herpesvirus of wide distribution causing malignant catarrhal fever of cattle; sheep and wildebeests harbor inapparent infections and may transmit the virus to cattle. (05 Mar 2000) |
| malignant ciliary epithelioma | <tumour> Malignant hyperplasia of ciliary epithelium with frequent involvement of the pigmented layer. Synonym: adult medulloepithelioma. (05 Mar 2000) |
| malignant dysentery | Dysentery in which the symptoms are intensely acute, leading to prostration, collapse, and often death. Synonym: fulminating dysentery. (05 Mar 2000) |
| malignant dyskeratosis | Dyskeratosis that may occur in precancerous or malignant lesions. (05 Mar 2000) |
| malignant endocarditis | Acute bacterial endocarditis, usually secondary to suppuration elsewhere and running a fulminating course. Synonym: septic endocarditis. (05 Mar 2000) |
| malignant exophthalmos | Relentless, progressive protrusion of the eyeballs. (05 Mar 2000) |