title: Asymmetry of the renal nephrograms on CT: significance of the unilateral prolonged cortical nephrogram.
abstract: The finding of asymmetry in the renal nephrograms as manifested by a unilateral prolonged cortical nephrogram on dynamic contrast-enhanced CT examinations signifies the presence of an abnormality of renal parenchymal perfusion and/or tubular transit. The differential diagnostic possibilities include stenosis or long-standing occlusion of the renal artery, renal vein thrombosis, and urinary tract obstruction.
authors.affiliation: Department of Radiology, New York University Medical Center, NY 10016.
authors.forename: B A
authors.initials: BA
authors.lastname: Birnbaum
authors.forename: M A
authors.initials: MA
authors.lastname: Bosniak
authors.forename: A J
authors.initials: AJ
authors.lastname: Megibow
mesh_terms: D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging*; D012016:Reference Values; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging; D012082:Renal Veins / Q000000981:diagnostic imaging; D013927:Thrombosis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging