title: Pigmented villonodular synovitis of the knee presenting as a popliteal cyst.
abstract: Pigmented villonodular synovitis is a locally aggressive tumor of the synovium of joints and tendon sheaths. It is commonly seen in the synovial lining of the flexor tendons of the hand and in the synovium of the knee and less commonly in other joints. A case of pigmented villonodular synovitis of the knee in a 60-year-old man, with an intra-articular origin extending extra-articularly, is presented. The interesting point is that the initial diagnosis was a Baker cyst.
authors.affiliation: Departments of Orthopaedics and Traumatology, Pathology, and Radiology, Dokuz Eylül University School of Medicine, Inciralti, Izmir, Turkey. hasan.tatar@deu.edu.tr
authors.forename: H
authors.initials: H
authors.lastname: Tatari
authors.forename: O
authors.initials: O
authors.lastname: Baran
authors.forename: B
authors.initials: B
authors.lastname: Lebe
authors.forename: S
authors.initials: S
authors.lastname: Kiliç
authors.forename: M
authors.initials: M
authors.lastname: Manisali
authors.forename: H
authors.initials: H
authors.lastname: Havitçioglu
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011151:Popliteal Cyst / Q000175:diagnosis*; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000473:pathology