Name : Morteza
Family :Sanei Taheri
Affiliation : Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree: Associate Professor of Radiology
Resident : Hussein Soleiman Tabar
Gender : Male
Age : 19
Uroradiology & Genital Male Imaging
19-year-old male with renal failure
Imaging Procedures and Findings
Both pelvicaliceal systems are markedly dilated (resulting in severe damage to kidneys), and then narrowed at ureteropelvic junctions. The ureters are not dilated (not shown).
Ureteropelvic junction obstruction is a common congenital anomaly that may go undiagnosed until adulthood. The amount of hydronephrosis and parenchymal atrophy present depends on the severity of obstruction. The condition is bilateral in 30% of cases but is often not symmetric. XU and US demonstrate pelvicaliectasis, with sharply defined narrowing at the ureteropelvic junction. The ureter is not dilated. In 15% to 20% of cases, an aberrant renal vessel causes the obstruction. MDCT is effective in demonstrating the crossing vessel. In the majority of cases, the precise cause is unknown.
Brant, William E.; Helms, Clyde A. Fundamentals of Diagnostic Radiology, 3rd Edition