title: What is your diagnosis?    Quiz: diffuse-pigmented villonodular synovitis.
authors.affiliation: Department of Orthopaedic Surgery, Hospital Dr. R.A Calderón Guardia, Universidad De Costa Rica, Heredia, Costa Rica.
authors.forename: E E
authors.initials: EE
authors.lastname: Zamora
authors.forename: M A
authors.initials: MA
authors.lastname: Donato
authors.forename: D
authors.initials: D
authors.lastname: Vanel
authors.forename: N
authors.initials: N
authors.lastname: Fabbri
authors.forename: M
authors.initials: M
authors.lastname: Mercuri
authors.forename: M
authors.initials: M
authors.lastname: Alberghini
mesh_terms: D000328:Adult; D003952:Diagnostic Imaging / Q000379:methods*; D006801:Humans; D008297:Male; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis*; D013848:Thigh / Q000473:pathology