| avian leukaemia-sarcoma complex | A term applied to a group of transmissible virus-induced diseases of chickens causing sarcoma, myeloblastosis, erythroblastosis, leukosis, osteopetrosis, and lymphomatosis. These agents are closely related viruses (avian leukosis-sarcoma virus) causing prolferation of immature erythroid, myeloid, or lymphoid cells, a division of the RNA tumour viruses (subfamily Oncovirinae) causing the avian leukosis-sarcoma complex of diseases; the viruses are subgrouped according to antigenic characteristics and growth in defined types of tissue culture cells. Synonym: avian erythroblastosis virus, avian leukosis-sarcoma virus, avian lymphomatosis virus, avian myeloblastosis virus, avian sarcoma virus, fowl erythroblastosis virus, fowl lymphomatosis virus, fowl myeloblastosis virus. (05 Mar 2000) |
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| avian sarcoma | <tumour> A fibrosarcoma, originally observed in a Plymouth Rock hen, now thought to be an expression of infection by certain viruses of the avian leukosis-sarcoma complex in the family Retroviridae. Synonym: avian sarcoma, Rous tumour. (05 Mar 2000) |
| botryoid sarcoma | <tumour> A polypoid form of embryonal rhabdomyosarcoma which occurs in children, most frequently in the urogenital tract, characterised by the formation of grossly apparent grapelike clusters of neoplastic tissue that consist of rhabdomyoblasts, spindle, and stellate cells in a myxomatous stroma; neoplasms of this type grow relatively rapidly and are highly malignant. (05 Mar 2000) |
| giant cell monstrocellular sarcoma of Zulch | A histologic form of glioblastoma with large, often multinucleated, bizarre, tumour cells. Synonym: giant cell monstrocellular sarcoma of Zulch. (05 Mar 2000) |
| giant cell sarcoma | <tumour> A malignant giant cell tumour of bone. (05 Mar 2000) |
| medullary sarcoma | <tumour> A soft, extremely vascular sarcoma. (05 Mar 2000) |
| reticulum cell sarcoma | <tumour> Obsolete term for histiocytic lymphoma. (05 Mar 2000) |
| granulocytic sarcoma | <tumour> A malignant tumour of immature myeloid cells, frequently subperiosteal, associated with or preceding granulocytic leukaemia. See: chloroma. Synonym: myeloid sarcoma. (05 Mar 2000) |
| periosteal sarcoma | <tumour> A form of osteogenic sarcoma of relatively low malignancy, probably arising from the periosteum and initially involving cortical bone and adjacent connective tissue, which occurs in middle-aged as well as young adults and most commonly affects the lower part of the femoral shaft. Synonym: periosteal sarcoma. (05 Mar 2000) |
| round cell sarcoma | <tumour> Old term for an undifferentiated malignant neoplasm, believed to be of mesenchymal origin, composed chiefly of closely packed round cells. (05 Mar 2000) |
| Rous sarcoma | <tumour> A fibrosarcoma, originally observed in a Plymouth Rock hen, now thought to be an expression of infection by certain viruses of the avian leukosis-sarcoma complex in the family Retroviridae. Synonym: avian sarcoma, Rous tumour. (05 Mar 2000) |
| multiple idiopathic haemorrhagic sarcoma | <oncology, tumour> A type of vascular cancer characterised by soft purple nodules that usually develop first on the feet and then slowly spread across the skin.This cancer is most often found in people with compromised immune systems, such as AIDS patients. (09 Oct 1997) |
| myelogenic sarcoma | <tumour> Sarcoma originating in the bone marrow. (05 Mar 2000) |
| myeloid sarcoma | <tumour> A malignant tumour of immature myeloid cells, frequently subperiosteal, associated with or preceding granulocytic leukaemia. See: chloroma. Synonym: myeloid sarcoma. (05 Mar 2000) |
| sarcoma | <oncology, tumour> A form of cancer that arises in the supportive tissues such as bone, cartilage, fat or muscle. Kaposi sarcoma: a sarcoma of spindle cells mixed with angiomatous tissue. Usually classed as an angioblastic tumour. A fairly frequent concomitant to HIV. Infection or long term immunosuppresion. (14 May 1997) |