title: Intermittent hydronephrosis: the occult ureteropelvic obstruction.
abstract: Occult ureteropelvic obstruction was found in 3 children and 7 adults with painful intermittent obstruction of urographically normal or nearly normal upper urinary tracts. These patients constituted 3.4 per cent of those who underwent pyeloplasty during a 10-year period. The occult obstruction was demonstrated dramatically by infusion excretory urography with furosemide stimulation in all 10 patients. The urographic lateralization was of even more value in 4 patients whose renal pelves were equally generous bilaterally and in 8 whose pain also was reproduced as a result of massive diuresis, which is characteristic of this technique alone. The manifestations and various other techniques for accurate diagnosis of this frequently elusive condition are discussed.
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D005665:Furosemide; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D007682:Kidney Pelvis; D008297:Male; D008875:Middle Aged; D004369:Pentetic Acid; D013667:Technetium; D016284:Technetium Tc 99m Pentetate; D014517:Ureteral Obstruction / Q000150:complications* / Q000151:congenital / Q000175:diagnosis; D014567:Urography
chemical_list: D013667:Technetium; D004369:Pentetic Acid; D005665:Furosemide; D016284:Technetium Tc 99m Pentetate