title: Localized pigmented villonodular synovitis of the knee with bone involvement mimicking a benign bone tumor: CT and MR findings.
abstract: The localized form of pigmented villonodular synovitis is characterized by a limited involvement of synovium. Although the knee is the joint that is commonly affected, bone changes in this location are not usual. We report the case of a histologically proven localized form of this entity in the knee, which mimicked a benign bone tumor on the basis of an MR pattern, CT findings, and scintigraphic results. Bone changes which may cause a pitfall in the diagnosis of the disorder are discussed.
authors.affiliation: Department of Radiology, University Hospital Saint-Pierre, Brussel, Belgium.
authors.forename: D
authors.initials: D
authors.lastname: Farrokh
authors.forename: J M
authors.initials: JM
authors.lastname: Annaert
authors.forename: L
authors.initials: L
authors.lastname: Fabeck
authors.forename: A
authors.initials: A
authors.lastname: Theunis
authors.forename: P
authors.initials: P
authors.lastname: Delincé
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000473:pathology; D008279:Magnetic Resonance Imaging; D013583:Synovial Membrane / Q000473:pathology; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000473:pathology; D014057:Tomography, X-Ray Computed