[Xanthine stone and xanthinuria associated with retrocaval ureter: Report of a case and a review of the literature (author's transl)].
D002675:Child, Preschool; D006801:Humans; D008297:Male; D014514:Ureteral Calculi / Q000209:etiology*; D014684:Venae Cavae; D014970:Xanthines / Q000652:urine*
D014970:Xanthines