1. Excretion of abnormally large amounts of xanthine in the urine.

2. A disorder resulting from defective synthesis of xanthine oxidase, characterised by urinary excretion of xanthine in place of uric acid, hypouricaemia, and, in some cases, the formation of xanthine stones; autosomal recessive inheritance.

Synonyms: xanthiuria, xanthuria.

Origin: xanthine + G. Ouron, urine

(05 Mar 2000)

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