title: Magnetic resonance imaging evaluation and arthroscopic resection of localized pigmented villonodular synovitis of the knee.
abstract: Diagnosis of localized pigmented villonodular synovitis is clinically difficult, and plain radiographs are usually normal. This article presents five patients with localized pigmented villonodular synovitis of the knee. Symptoms suggested a meniscal lesion in three patients and a loose body in two. Magnetic resonance imaging performed prior to arthroscopic resection revealed a preoperative diagnosis of a tumor in all five patients. Magnetic resonance imaging is a valuable clinical tool for the assessment of intra-articular soft-tissue tumors of the knee that may otherwise be misdiagnosed.
authors.affiliation: Arthroscopic Surgery Section, Italian Hospital of Buenos Aires, Argentina.
authors.forename: D L
authors.initials: DL
authors.lastname: Muscolo
authors.forename: A
authors.initials: A
authors.lastname: Makino
authors.forename: M
authors.initials: M
authors.lastname: Costa-Paz
authors.forename: M
authors.initials: M
authors.lastname: Ayerza
mesh_terms: D000328:Adult; D001182:Arthroscopy / Q000379:methods*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000601:surgery*; D016896:Treatment Outcome