title: Masked obstruction of the renal collecting system.
abstract: Two cases of apparent unilateral renal obstruction in which lesser contralateral obstructions were not seen are presented. In both cases, relief of the more severe obstruction resulted in an unmasking of the milder contralateral lesion.
authors.forename: P W
authors.initials: PW
authors.lastname: Blue
authors.forename: S M
authors.initials: SM
authors.lastname: Manier
authors.forename: N
authors.initials: N
authors.lastname: Ghaed
mesh_terms: D000328:Adult; D003556:Cystitis / Q000150:complications; D005665:Furosemide; D006801:Humans; D008297:Male; D009942:Organometallic Compounds; D004369:Pentetic Acid; D011877:Radionuclide Imaging; D016284:Technetium Tc 99m Pentetate; D014517:Ureteral Obstruction / Q000151:congenital / Q000000981:diagnostic imaging* / Q000209:etiology
chemical_list: D009942:Organometallic Compounds; D004369:Pentetic Acid; D005665:Furosemide; D016284:Technetium Tc 99m Pentetate