| MEO | malignant external otitis |
|---|---|
| MFH | malignant fibrous histiocytoma |
| MGSA | malignant growth stimulatory activity |
| MHI | malignant histiocytosis of intestine; Mental Health Index; Mental Health Inventory |
| MHR | major histocompatibility region; malignant hyperthermia resistance; maternal heart rate; maximal hea... |
| midline malignant reticulosis granuloma | Destruction of the nasal septum, hard palate, lateral nasal walls, paranasal sinuses, skin of the face, orbit and nasopharynx by an inflammatory infiltrate with atypical lymphocytic and histiocytic cells; presumably a form of lymphoma in most cases. An obsolete term for polymorphic reticulosis. Synonym: granuloma gangrenescens, malignant granuloma, midline malignant reticulosis granuloma. (05 Mar 2000) |
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| mixed tumour, malignant | A malignant tumour composed of more than one type of neoplastic tissue. (12 Dec 1998) |
| well-differentiated lymphocytic lymphoma | <tumour> Essentially the same disease as chronic lymphocytic leukaemia, except that lymphocytes are not increased in the peripheral blood; lymph nodes are enlarged and other lymphoid tissue or bone marrow is infiltrated by small lymphocytes. Synonym: small lymphocytic lymphoma. (05 Mar 2000) |
| pleural effusion, malignant | Presence of fluid in the pleural cavity as a complication of malignant disease. Malignant pleural effusions often contain actual malignant cells. (12 Dec 1998) |
| poorly differentiated lymphocytic lymphoma | <tumour> A B-cell lymphoma with nodular or diffuse lymph node or bone marrow involvement by large lymphoid cells. Synonym: follicular predominantly small cleaved cell lymphoma, nodular histiocytic lymphoma. (05 Mar 2000) |
| cutaneous T-cell lymphoma | <oncology, tumour> A type of non-Hodgkin's lymphoma that first appears on the skin. Synonym: mycosis fungoides. (13 Nov 1997) |
| histiocytic disorders, malignant | Distinctive neoplastic disorders of histiocytes. Included are acute monocytic leukaemias, malignant histiocytosis (histiocytosis, malignant), and true histiocytic lymphomas. (12 Dec 1998) |
| histiocytic lymphoma | <tumour> A malignant tumour of reticular tissue composed predominantly of neoplastic histiocytes. See: large cell lymphoma. (05 Mar 2000) |
| histiocytosis, malignant | A rare, usually rapidly progressive disorder, characterised by abrupt onset, fever, weight loss, hepato-splenomegaly, pancytopenia, and lymphadenopathy. (12 Dec 1998) |
| Hodgkin's lymphoma | <haematology, oncology> A human malgnant disorder of lymph tissue (lymphoma) that appears to originate in a particular lymph node and later spreads to the spleen, liver and bone marrow. It occurs mostly in individuals between the ages of 15 and 35. It is characterised by progressive, painless enlargement of the lymph nodes, spleen and general lymph tissue. Giant cells, the Reed Sternberg cells, with mirror image nuclei are diagnostic. Immunological depletion, caused perhaps by the excessive growth of neoplastic histiocytes, occurs. Four types of the disease are recognised depending on the relative predominance of various neoplastic derivatives of the lymphoid series. Pyrexia is often a feature of the disease. Death often results from generalised immunological inability to respond to infections. If detected early, it has a high remission rate. Staging: Ann Arbor classification; each stage is further classified as:, A no symptoms, B fever, sweats, weight loss. Stage I - involvement of a single lymph-node region or extralymphatic site. Stage II - two or more sites of involvement on the same side of the diaphragm. Stage III - disease involvement on both sides of the diaphragm. Stage IV - disseminated disease of extralymphatic organs, with or without lymph-node involvement. Indicence: approximately 1,500 new cases per year in the UK. (30 Mar 2000) |
| human T-cell lymphoma/leukaemia virus | A group of viruses (subfamily Oncovirinae, family Retroviridae) that are lymphotropic with a selective affinity for the helper/inducer cell subset of T lymphocytes and that are associated with adult T-cell leukaemia and lymphoma. Synonym: human T-cell lymphotropic virus. (05 Mar 2000) |
| hypertension, malignant | Severe hypertension characterised by papilledema and necrosis of small arteries and arterioles. The diastolic pressure is generally greater than 130 mm hg. (12 Dec 1998) |
| small bowel lymphoma | <radiology> Patterns:, infiltrative dilatation, nodular multiple filling defects, polypoid may cause intussiception from leading point associated with Burkitt lymphoma, endoexoenteric fistulae (12 Dec 1998) |
| small lymphocytic lymphoma | <tumour> Essentially the same disease as chronic lymphocytic leukaemia, except that lymphocytes are not increased in the peripheral blood; lymph nodes are enlarged and other lymphoid tissue or bone marrow is infiltrated by small lymphocytes. Synonym: small lymphocytic lymphoma. (05 Mar 2000) |
| neuroleptic malignant syndrome | <syndrome> This describes the combination of catatonic rigidity, stupor, unstable blood pressure, fever, profuse sweating, sweating and incontinence as a reaction to antipsychotic agents (phenothiazines) in therapeutic doses. Origin: Gr. Lepsis = a taking hold (27 Sep 1997) |