Juvenile idiopathic arthritis among Nigerians: a case study.

Juvenile idiopathic arthritis (JIA) has rarely been reported among Black Africans. This retrospective case study was part of an audit of cases presenting to a private practice rheumatology clinic in Lagos, Nigeria. The objective of this study was to determine the clinical, laboratory, and radiographic features of patients with JIA, as well as to highlight their management. A total of 23 cases (F-16:M-7) were seen over an 8.5-year period. Polyarticular presentation was the commonest while systemic onset was the least. The mean age at presentation was 12.7 years. Most of the patients presented late with mean of 3.7 years before presentation. The knees and ankles were most commonly involved. ESR was elevated in most of the cases. Rheumatoid factor and Antinuclear antibodies were invariably negative. Treatments were with standard drugs. Although JIA is uncommonly seen in our population, the clinical and laboratory features are similar as elsewhere, though there are some differences.