New Drainage Technique in the Ureteropelvic Junction Obstructions: Side-to-side Ureterocalicostomy (or Ureterocaliceal By-pass) Preserving Renal Pelvis and Ureteropelvic Junction

We present a new ureterocalicostomy technique in a patient with intrarenal pelvis together with renal artery compression on the pelvis and ureteropelvic junction (UPJ). The patient had grade 4 hydronephrosis in the left kidney and angulation at the ureteropelvic junction. We performed side-to-side ureterocalicostomy between the ureter and lower calyx of the kidney.