title: Evening urinary oxalate excretion in stone formers.
abstract: Urine collections from stone formers and controls were made between 6 p.m. and midnight and analysed for oxalate content. No difference in oxalate output was found between these groups. This makes it unlikely that hyperabsorption of oxalate from the intestine is a common cause of idiopathic calcium oxalate stones. The convenience of 6-h urine collections for detecting hypercalciuria is discussed.
mesh_terms: D002129:Calcium Oxalate / Q000378:metabolism / Q000652:urine*; D002940:Circadian Rhythm; D006801:Humans; D007408:Intestinal Absorption; D008297:Male; D008875:Middle Aged; D014545:Urinary Calculi / Q000209:etiology / Q000652:urine*
chemical_list: D002129:Calcium Oxalate