| fibroma, desmoplastic | A extremely rare bone tumour characterised by abundant collagen formation and a fibrous stroma, without evidence of mitosis or pleomorphism. It appears on X-rays as an osteolytic lesion with well-defined margins and must be differentiated from primary fibrosarcoma of bone. (devita jr et al., cancer: principles & practice of oncology, 3d ed, p1441) (12 Dec 1998) |
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| fibroma molle | A polypoid outgrowth of both epidermis and dermal fibrovascular tissue, common terminology for any small benign cutaneous lesion. Synonym: acrochordon, fibroepithelial polyp, fibroma molle, senile fibroma, soft wart. (05 Mar 2000) |
| fibroma molle gravidarum | Skin tags or polyps that develop on women during pregnancy and often disappear at term. (05 Mar 2000) |
| fibroma myxomatodes | <tumour> A benign neoplasm of fibrous connective tissue that resembles primitive mesenchymal tissue. Synonym: fibroma myxomatodes, myxoma fibrosum. Origin: myxo-+ L. Fibra, fibre, + G. -oma, tumour (05 Mar 2000) |
| fibroma, ossifying | A benign, relatively slow-growing, central bone tumour, usually of the jaws (especially the mandible) which is composed of fibrous connective tissue within which bone is formed. (12 Dec 1998) |
| bovine virus diarrhoea virus | A virus of the genus Pestivirus, in the family Togaviridae, causing bovine virus diarrhoea; New York, Oregon, and Indiana strains of the virus are recognised. Synonym: mucosal disease virus. (05 Mar 2000) |
| abelson leukaemia virus | A defective murine leukaemia virus capable of transforming lymphoid cells and producing a rapidly progressing lymphoid leukaemia after superinfection with friend, moloney, or rauscher virus. (12 Dec 1998) |
| Abelson murine leukaemia virus | A retrovirus belonging to the Type C retrovirus group subfamily (family Oncovirinae) which is associated with leukaemia and produces in vitro transformation of mouse cells. (05 Mar 2000) |
| adeno-associated virus | <virology> A genus of viruses in the family Parvoviridae which are all defective viruses (unable to replicate by themselves) and depend on the co-infection of their host cell by other, nondefective viruses to help them replicate. (09 Oct 1997) |
| adenoidal-pharyngeal-conjunctival virus | <virology> An icosahedral (20-sided) virus that contains DNA, there are over 40 different adenovirus varieties, some of which cause the common cold. (10 May 1997) |
| adenosatellite virus | <virology> A genus of viruses in the family Parvoviridae which are all defective viruses (unable to replicate by themselves) and depend on the co-infection of their host cell by other, nondefective viruses to help them replicate. (09 Oct 1997) |
| african horse sickness virus | A species of orbivirus that causes disease in horses, mules, and donkeys. (12 Dec 1998) |
| african swine fever virus | The lone species of the genus african swine fever-like viruses. The virus causes a fatal disease among domestic pigs in africa and a less virulent infection in europe. The virus is present in soft ticks (ornithodoros moubata), warthogs, or domestic pigs. Originally listed as a species of iridoviridae, the virus exhibits some similarities to poxviridae but its differences warranted placement in a separate genus of an, as yet unknown, family. (12 Dec 1998) |
| AIDS-related virus | An obsolete term for human immunodeficiency virus. (05 Mar 2000) |
| Akabane virus | A virus of the genus Bunyavirus, family Bunyaviridae, causing abortion in cattle and congenital arthrogryposis and hydranencephaly in bovine foetuses in Israel, Japan, and Australia; it is transmitted by mosquitoes. (05 Mar 2000) |