The excretion of one or more pentoses in the urine.

Alimentary pentosuria, the urinary excretion of l-arabinose and l-xylose, as the result of the excessive ingestion of fruits containing these pentoses.

Essential pentosuria, a benign heritable disorder in which the urinary output of l-xylulose is 1 to 4 g per 24 hr; it occurs principally in Ashkenazi Jewish; autosomal recessive inheritance.

Synonyms: l-xylulosuria, primary pentosuria.

(05 Mar 2000)