title: LOCALIZED PIGMENTED VILLONODULAR SYNOVITIS: CASE REPORT.
abstract: This case concerned a female patient with a complaint of pain in the anterior region of her left knee during and after sports activities, followed by joint blockage three months ago. From imaging examinations, simple radiography of the knee was normal and magnetic resonance showed a solid expansive mass, possibly corresponding to soft-tissue chondroma or focal nodular synovitis. Arthroscopic resection of the lesion was performed, and the diagnosis of diffuse giant cell tumor resembling localized pigmented villonodular synovitis (PVNS) was made from the result of the anatomopathological examination. The patient presented good clinical evolution, with disappearance of symptoms and return to physical activities.
authors.affiliation: Trainee Physician in the Knee Group, Orthoservice Hospital, Sâo José dos Campos, Sâo Paulo, Brazil.
authors.forename: Fabiola Andrea de
authors.initials: FA
authors.lastname: Carvalho Godoy
authors.affiliation: Physician responsible for the Knee Surgery Group, Orthoservice Hospital, Sâo José dos Campos, Sâo Paulo, Brazil.
authors.forename: Carlos Alberto Cury
authors.initials: CA
authors.lastname: Faustino
authors.affiliation: Pathologist at Cipax Laboratory, Sâo José dos Campos, Sâo Paulo, Brazil.
authors.forename: Cláudio Santos
authors.initials: CS
authors.lastname: Meneses
authors.affiliation: Physician in the Knee Group, Orthoservice Hospital, Sâo José dos Campos, Sâo Paulo, Brazil.
authors.forename: Sergio Tadao
authors.initials: ST
authors.lastname: Nishi
authors.affiliation: Physician in the Knee Group, Orthoservice Hospital, Sâo José dos Campos, Sâo Paulo, Brazil.
authors.forename: César Eduardo Giancoli
authors.initials: CE
authors.lastname: Góes
authors.affiliation: Pathologist at Cipax Laboratory, Sâo José dos Campos, Sâo Paulo, Brazil.
authors.forename: Abaeté Leite do
authors.initials: AL
authors.lastname: Canto
keywords: Arthroscopy; Giant cell tumor; Knee; Pigmented Villonodular; Synovitis