title: Magnetic resonance imaging of pigmented villonodular synovitis: a report of two cases.
abstract: The magnetic resonance imaging characteristics of two surgically proven cases of pigmented villonodular synovitis are reported. On the short TR/TE pulse sequences, the synovium has an intermediate signal intensity. Long TR/TE pulse sequences show the synovium containing areas of increased signal interspersed with decreased signal. Hemosiderin deposition is believed to account for the areas of decreased signal; the increased signal results from fluid and inflamed synovium.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000473:pathology; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D013585:Synovitis / Q000175:diagnosis*; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed