title: Pigmented villonodular synovitis of the knee presenting as a loose body. A case report.
abstract: A 21-year-old woman with a history of internal derangement of the knee and a palpable loose body was found to have localized villonodular synovitis at surgical exploration.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000175:diagnosis; D007719:Knee Joint; D013585:Synovitis / Q000175:diagnosis*; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis*