title: [Young woman with relapsing arthritis].
abstract: A 28-years old lady complains of self-limited episodes of relapsing knee arthritis of 48-72h of duration every 2 weeks. Immunological profile was all negative. At the same time, radiological images did not reveal any abnormality. She underwent to knee arthroscopy, however, a definite diagnosis was not reached. We discuss the differential diagnosis of relapsing arthritis.
authors.affiliation: Unidad de Artritis, Servicio de Reumatología, Hospital Clínic, Barcelona, España.
authors.forename: José A
authors.initials: JA
authors.lastname: Gómez-Puerta
authors.forename: Emma
authors.initials: E
authors.lastname: García-Melchor