Pyelorenal backflow during retrograde pyelography in adult patients.
In a consecutive series of 103 retrograde pyelographies in adult patients suspect of disease in the upper urinary tract, the overall incidence of pyelorenal backflow was 18%. Pyelosinous backflow--seen in 11%--was much more frequent in kidneys with obstructed ureter (20%) than in non-obstructed kidneys (3%). Intrarenal backflow, so far regarded as a rare form of backflow, was almost as frequent as pyelosinous backflow. It occurred in 13% of kidneys with obstructed ureter as opposed to 7% in non-obstructed kidneys. Intrarenal backflow mostly involved only a section of the kidney, in 75% of cases in the upper pole. It occurred both in diseased and in apparently normal kidneys. Pyelosinous and intrarenal backflow in the same kidney was seen in 2% of cases.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007668:Kidney / Q000503:physiopathology*; D007682:Kidney Pelvis / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014513:Ureter / Q000000981:diagnostic imaging*; D014517:Ureteral Obstruction / Q000503:physiopathology; D014546:Urinary Catheterization; D014567:Urography; D014570:Urologic Diseases / Q000000981:diagnostic imaging