title: Intra-articular osteochondroma of the posterior cavity of the knee.
abstract: A patient with a large intra-articular osteochondroma of the posterior cavity of the knee joint is presented. Preoperative imaging included radiographs and magnetic resonance imaging, which revealed a completely intra-articular, locally expanding, mineralised mass in the intercondylar tunnel and posterior joint cavity. Flexion was limited to 70 deg. The osteochondroma was removed from a posterior approach. Gross and histologic pictures are presented, and the origin and pathogenesis of the tumour are discussed. After removal, the clinical course was benign. Full flexion was regained within 2 months. At the 2-year follow-up, no signs of recurrence were evident on radiographs and magnetic resonance imaging.
authors.affiliation: Clinic for Orthopaedic Surgery, University Hospital, 66421 Homburg/Saar, Germany. Michael_Dienst@yahoo.de
authors.forename: Michael
authors.initials: M
authors.lastname: Dienst
authors.forename: Guenther
authors.initials: G
authors.lastname: Schneider
authors.forename: Stefan
authors.initials: S
authors.lastname: Pahl
authors.forename: Stefan
authors.initials: S
authors.lastname: Ensslin
authors.forename: Dieter
authors.initials: D
authors.lastname: Kohn
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D007719:Knee Joint / Q000503:physiopathology; D008279:Magnetic Resonance Imaging; D015831:Osteochondroma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D011859:Radiography; D016059:Range of Motion, Articular