| avascular | <pathology> Without blood or lymphatic vessels; may be a normal state as in certain forms of cartilage, or the result of disease. Synonym: nonvascular. (05 Mar 2000) |
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| avascular necrosis | <radiology> Aetiology (PLASTIC RAGS): P pancreatitis, L lupus, A alcohol, S steroids, T trauma, I idiopathic, infection, C caisson disease, collagen vascular disease, R radiation, rheumatoid arthritis, A amyloid, G Gaucher disease, S sickle cell disease findings: sclerosis, crescent sign, collapse (e.g., of femoral head) see also: staging (12 Dec 1998) |
| avascular necrosis staging | <radiology> Stage CT/X-ray bone scan I - cold/hot spot II sclerotic focus with osteopenic ring III crescent sign (subchondral lucency) IV articular collapse flattening of femoral head sensitivity 86% 78% specificity 79% 75% see also: avascular necrosis (AVN) (12 Dec 1998) |