Laparoscopic Curative Resection of Synchronous Primary Colon Adenocarcinoma and Renal Cell Carcinoma: A Case Report

Introduction: Synchronous colorectal and renal carcinomas are rare entity, with a reported incidence of 0.4 to 4.85%. Both are primary cancers occurring in the same patient, either at the same time or within 6 months apart.

Presentation of Case: We report a case of a 61-year-old man who presented with 3 months history of left lower abdominal pain and painless per rectal bleeding. Colonoscopy revealed a fungating mass 20 cm from the anal verge and histopathological examination of the biopsies confirmed a moderately differentiated adenocarcinoma. Computed tomography scan of abdomen showed a thickened sigmoid colon with enlarged pericolic lymph nodes and an incidental finding of a left renal upper pole mass. He underwent laparoscopic left partial nephrectomy and laparoscopic anterior resection in the same setting. Histopathological examination revealed moderately differentiated adenocarcinoma of sigmoid colon and a clear cell renal cell carcinoma with good margins of resection. He recovered well, completed adjuvant chemotherapy and remained recurrence free at his 1-year follow-up.

Conclusions: Simultaneous laparoscopic surgery for synchronous colorectal and renal carcinomas offers the advantages of primary tumour resection within the same setting & is technically feasible and safe. When attempting surgery for tumours involving left hemicolon and left kidney, a combined approach where nephrectomy followed by colonic resection should be the surgical strategy.