[A Case of Colon Metastasis after Surgery for Left Renal Pelvis Cancer]

The patient was a 73-year-old man. He was diagnosed with left renal pelvic carcinoma(papillary urothelial carcinoma, pT3aN0M0, Stage Ⅱ)at the age of 69. Left nephroureterectomy and partial cystectomy were performed at our hospital. At the age of 71, he was diagnosed with a recurrent bladder tumor and underwent radical cystectomy and ureteroenterostomy at a different hospital. At the age of 73, he visited our hospital with abdominal pain. Computed tomography(CT)revealed wall thickening of the descending colon and dilation of the oral tract. Emergency colonoscopy was performed. He was diagnosed with intestinal obstruction due to descending colon cancer. Colonoscopy revealed a circumferential type 2 lesion in the descending colon that was completely stenosed. Colonic stent placement was performed. A tumor biopsy confirmed the diagnosis of micropapillary adenocarcinoma. The preoperative diagnosis was descending colon cancer cT4aN2aM0, cStage Ⅲc. One month after stent placement, an open segmental resection of the descending colon with D2 dissection was performed. Immunostaining of the specimen showed CK7(+)and CK20(-), and the postoperative diagnosis was a recurrence of left renal pelvic carcinoma in the descending colon. We report a rare case of renal pelvic carcinoma that recurred in the descending colon 4 years after initial surgery.