Mujer joven con artritis intermitente

A 28-years old lady complains of self-limited episodes of relapsing knee arthritis of 48-72 h 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.