Report of a Case of Sigmoid Colon Cancer with a Duplicated Ureter

Abstract

A 60-year-old male was admitted to our hospital complaining of lower abdominal pain. Abdominal contrast-enhanced CT showed a tumor in the sigmoid colon and peritoneal free air. On the basis of these findings, the patient was diagnosed as having penetrated sigmoid colon cancer with lymph node metastasis. Elective laparoscopic sigmoidectomy was performed. At operation, the right hypogastric nerve was found to be invaded by the tumor, therefore it was resected. Two cord-like structures were recognized on the right side of the rectum, one of which was also invaded by the tumor. We resected this structure also, after confirming that it was the right ureter. However, another ureter was also seen emerging from the lower pole of the right kidney. We reconstructed the urinary tract by end-to-side anastomosis. Duplicated ureter is not very rare, therefore, the possible existence of urinary tract malformations must be kept in mind during colorectal surgery.