| lipoma ossificans | A lipoma in which metaplasia occurs and small foci of bone are formed. (05 Mar 2000) |
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| pelvospondylitis ossificans | Deposit of bony substance between the vertebrae of the sacrum. Origin: L. Pelvis, basin, + G. Spondylos, vertebra, + -itis; L. Os, bone, + facio, to make (05 Mar 2000) |
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| myositis ossificans | A disease characterised by bony deposits or the ossification of muscle tissue. (12 Dec 1998) |
| myositis ossificans circumscripta | Local deposit of bone in a muscle, usually following prolonged trauma; e.g., riders' bone. (05 Mar 2000) |
| myositis ossificans progressiva | <radiology> Progressive skeletal fusion, ossification of ligaments, nuchal ligament, pelvic entheses, asymptomatic at birth, 90% have short great toes (12 Dec 1998) |
| atypical lipoma | <tumour> Lipoma, occurring primarily in older men on the posterior neck, shoulders, and back, which is benign but microscopically atypical, containing giant cells with multiple overlapping nuclei forming a circle. Synonym: pleomorphic lipoma. (05 Mar 2000) |
| CNS lipoma | <radiology> Incidence: less than1% of brain tumours, age: presentation in childhood/adulthood, associated with agenesis of corpus callosum in 50%, assymptomatic in 50% location: genu of corpus callosum (25-50%), tuber cinerum, quadrigeminal region, chiasmatic, interpeduncular, sylvian, CP angle, and cerebellomedullary cisterns findings: -100 HU on CT, occasionally calcified rim (especially in corpus callosum), no enhancement, hyperintense on T1 (characteristic) (12 Dec 1998) |
| pleomorphic lipoma | <tumour> Lipoma, occurring primarily in older men on the posterior neck, shoulders, and back, which is benign but microscopically atypical, containing giant cells with multiple overlapping nuclei forming a circle. Synonym: pleomorphic lipoma. (05 Mar 2000) |
| spindle cell lipoma | <tumour> A microscopically distinctive form of lipoma in which adipose tissue is infiltrated by fibroblasts and collagen; usually found in the shoulder or neck of elderly men. (05 Mar 2000) |
| infiltrating lipoma | A malignant tumour derived from primitive or embryonal lipoblastic cells. It may be composed of well-differentiated fat cells or may be dedifferentiated: myxoid (liposarcoma, myxoid), round-celled, or pleomorphic, usually in association with a rich network of capillaries. Recurrences are common and dedifferentiated liposarcomas metastasize to the lungs or serosal surfaces. (12 Dec 1998) |
| telangiectatic lipoma | A benign neoplasm composed of a mixture of adipose tissue and blood vessels. (12 Dec 1998) |
| lipoblastic lipoma | A malignant tumour derived from primitive or embryonal lipoblastic cells. It may be composed of well-differentiated fat cells or may be dedifferentiated: myxoid (liposarcoma, myxoid), round-celled, or pleomorphic, usually in association with a rich network of capillaries. Recurrences are common and dedifferentiated liposarcomas metastasize to the lungs or serosal surfaces. (12 Dec 1998) |
| lipoma | <oncology, tumour> Clumps of fat cells. Literally, fat cancer. These are benign tumours that can form in the breast. (16 Dec 1997) |
| lipoma annulare colli | An encircling growth of lipoma (or coalescent lipoma's) in the neck, resulting in a collar-like enlargement. See: Madelung's neck. (05 Mar 2000) |
| lipoma arborescens | An irregularly shaped lipoma involving the synovial membrane of a joint, resulting in fingerlike or treelike hyperplastic folds in the villi. (05 Mar 2000) |
| lipoma capsulare | A well-circumscribed mass resulting from a greatly increased amount of adipose tissue adjacent to the breast. (05 Mar 2000) |