title: Pigmented Villonodular Synovitis: a recurrent case with atypical location and extra-articular extension.
abstract: Pigmented Villonodular Synovitis (PVNS) remains a diagnostic challenge because of its non-specific presentation and subtle radiological findings. This uncommon entity is characterized by a benign synovial membrane proliferation of joints, tendon sheaths and bursas. The authors report a case of recurrent PVNS affecting an uncommon location (the first left metatarsophalangeal joint), which extended well beyond the joint margins on recurrence, in a patient with non-specific complaints of joint pain and swelling.
authors.forename: M
authors.initials: M
authors.lastname: Coutinho
authors.forename: A
authors.initials: A
authors.lastname: Laranjo
authors.forename: J A
authors.initials: JA
authors.lastname: da Silva
authors.forename: J
authors.initials: J
authors.lastname: Casanova
mesh_terms: D005260:Female; D006801:Humans; D008875:Middle Aged; D012008:Recurrence; D013586:Synovitis, Pigmented Villonodular / Q000473:pathology*