Juvenile rheumatoid arthritis manifesting in only limping due to flexion contraction of the knee.

Juvenile rheumatoid arthritis (JRA) is a relatively uncommon condition. The damage to the cartilaginous tissue is often irreversible and responsible for much of the morbidity. Timely diagnosis and appropriate aggressive treatment of patients improve quality of life and outcome. A reported case of JRA is presented in which limping associated with flexion contraction of the knee developed without any systemic symptoms. Magnetic resonance imaging and arthroscopic examination were helpful with early diagnosis. Aspirin was effective. There have been no recurrence to date.