A CASE OF GOUTY ARTHRITIS ASSOCIATED WITH DOWN'S SYNDROME

Abstract
Gouty arthritis developed in a 21 yr old male whose karyotyping showed trisomy 21. His serum urate level was 13.1 mg/100 ml and his 24 h urinary uric acid excretion was 431 mg on a low purine diet. Uric acid clearance was decreased to 3.9 ml/min. The cumulative incorporation of N15-glycine into urinary uric acid during 7 successive days was 0.144%, which was within the normal range. Diminished uric acid clearance may be attributed to this hyperuricemia. The cause of gouty arthritis and Down''s syndrome in the patient is discussed.