case_images: PMC7180074_01
case_images: Coronal view of the magnetic resonance image of the typical type 1 retrocaval ureter variant with S-shaped deformity of right lumbar ureter with hydronephrosis and dilatation of the associated proximal ureter (case 2).
case_images: 10-1055-s-0040-1705156-i19505cr-1.jpg
case_images: PMC7180074_01_10-1055-s-0040-1705156-i19505cr-1.jpg
case_images: FI19505cr-1
case_images: Abdominal MRI with three-dimensional reconstruction revealed that both the patients had a typical S-shaped deformity of the right lumbar ureter, according with type 1 variant of RCU  ( Fig. 1 ).
case_images: Intraoperative images of the proximal dilated right ureter (case 2). (
  A
  ) Dilated proximal ureter (PU) crossing the inferior vena cava (IVC). (
  B
  ) Mobilization of the PU with narrowed segment under the IVC. (
  C
  ) Stenotic tract of the ureter excised. (
  D
  ) Uretero-ureteric anastomosis after spatulation.
case_images: 10-1055-s-0040-1705156-i19505cr-2.jpg
case_images: PMC7180074_01_10-1055-s-0040-1705156-i19505cr-2.jpg
case_images: FI19505cr-2
case_images: The dilated pelvis and right ureter were identified after mobilizing the right colon and opening the Gerota fascia ( Fig. 2A ). The proximal ureter was lifted on a vessel loop, and the distal ureter segment was poorly mobilized in the inter-aorto-caval region ( Fig. 2B ). The ureter was transected proximally to the IVC, and then the stenotic tract was excised ( Fig. 2C ). A 4.7-Fr double-J stent was inserted laparoscopically with an antegrade technique through a percutaneous 18-G needle ( Fig. 2D ).