| leproma | A fairly well-circumscribed discrete focus of granulomatous inflammation, caused by Mycobacterium leprae, which consists chiefly of an accumulation of large mononuclear phagocytic cells in which the cytoplasm seems finely vacuolated (i.e., foam cells); the foamlike character of the macrophages is related to the engulfing of numerous acid-fast organisms. Origin: G. Lepros, scaly, + -oma, tumour (05 Mar 2000) |
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| histoid | 1. Resembling in structure one of the tissues of the body. 2. Sometimes used with reference to the histologic structure of a neoplasm derived from and consisting of a single, relatively simple type of neoplastic tissue that closely resembles the normal, as in certain fibromas and leiomyomas. Synonym: histioid. Origin: histo-+ G. Eidos, resemblance (05 Mar 2000) |
| histoid leprosy | A form of lepromatous leprosy with lesions microscopically resembling dermatofibromas or other spindle-celled tumours. (05 Mar 2000) |
| histoid neoplasm | Old term for a neoplasm characterised by a cytohistologic pattern that closely resembles the tissue from which the neoplastic cells are derived. (05 Mar 2000) |
| histoid tumour | Old term for a tumour composed of a single type of differentiated tissue. (05 Mar 2000) |
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