Congenital right sided ureteropelvic junction obstruction in right crossed fused ectopia with extrarenal calyces masquerading as massive retroperitoneal urinoma in a case of blunt trauma abdomen: A diagnostic enigma and novel approach of management

An 18 years old young male presented with history of blunt trauma to abdomen with mild hematuria. The contrast enhanced computerized tomography of abdomen revealed crossed fused right renal ectopia with distal large fluid filled sac confusing with urinoma. A midline laparotomy revealed it to be case of right hydronephrotic ectopic fused kidney with extrarenal calyces with large midline pelvis in retroperitoneum. Tailoring of renal pelvis with preservation of posterior pelvic wall plate and ureteral reconstruction was done which was anastomosed to native right ureter. The patient is doing well in one year of follow-up.