[Glycosaminoglycans as a defense mechanism of the urothelium, in children].

: The quantity variations of glycosaminoglycans (GAGS) in urothelial samples from patients with malformations presenting infectious, obstructive or lithiasis signs have been investigated. They showed a highly significant deficiency in GAGS in patients with recurrent infections of the urinary ways, a more limited deficiency in sufferers from lithiasis and values within the normal range in patients with obstructive malformations.