oligoarticular type I juvenile idiopathic arthritis


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oligoarticular type I juvenile idiopathic arthritis

A form of JIA that accounts for about 33% of all cases; 80% of cases occur in girls, usually presenting in early childhood. Only a few joints are involved, typically the large joints of the knee, ankle, or elbow. One third of cases develop chronic iridocyclitis. Results of rheumatoid factor evaluation are usually negative. Ultimately, 10% of these children develop ocular damage, and 20% go on to develop polyarthritis.
See also: arthritis