title: [Pigmented villonodular synovitis with polyarticular presentation].
abstract: Pigmented villonodular synovitis (PSV) rarely involves more than one joint, and its occurrence in children is uncommon. One case of PSV with polyarticular involvement in a child is presented, and the differential diagnoses with other polyarthritis are offered. Synovial biopsy of both knees at different ages showed the presence of PSV in a fourteen years old boy with a nine years history of painless swelling of wrist, knees and ankles. Painless polyarticular swelling with few inflammatory signs, negative acute-phase laboratory tests, normal synovial fluid, periarticular soft tissue swelling on plain films and a mandatory synovial biopsy are the diagnostic clues of this rare presentation.
authors.affiliation: Unidad de Reumatología, Hospital Torrecárdenas, Almería.
authors.forename: A
authors.initials: A
authors.lastname: García Sánchez
authors.forename: M
authors.initials: M
authors.lastname: Utrilla Utrilla
authors.forename: J L
authors.initials: JL
authors.lastname: Casals Sánchez
authors.forename: F
authors.initials: F
authors.lastname: Díez García
authors.forename: A
authors.initials: A
authors.lastname: Collado Romacho
mesh_terms: D000293:Adolescent; D000843:Ankle Joint / Q000473:pathology; D001706:Biopsy; D006801:Humans; D006965:Hyperplasia; D007719:Knee Joint / Q000473:pathology; D008297:Male; D013583:Synovial Membrane / Q000473:pathology; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis / Q000473:pathology; D014955:Wrist Joint / Q000473:pathology
vernacular_title: Sinovitis villonodular pigmentada de presentación poliarticular.