[A case of early colorectal cancer with synchronous multiple liver metastases]

We report the case of a 64-year-old man who had early submucosal invasive colorectal cancer with synchronous multiple liver metastases. The patient underwent endoscopic resection for a type Isp polyp of the sigmoid colon. The pathological diagnosis was well-differentiated adenocarcinoma with submucosal layer( sm3) invasion and lymphatic infiltration (ly2). A positive vertical margin was suspected. Abdominal computed tomography revealed multiple tumors at the S2/3, S5, and S8 segments of the liver and a small gastric submucosal tumor. The patient underwent sigmoid colon resection with D3 lymphadenectomy, left lateral hepatic segmentectomy, partial hepatectomy in the S5 and S8 segments, and partial gastrectomy. Histological examination showed lymph node metastasis but no residual cancer in the sigmoid colon. The histological findings from the liver were similar to those found in primary colorectal carcinoma. The gastric submucosal tumor was confirmed to be a gastrointestinal stromal tumor with a low risk grade. As the present case is considered rare, we herein review our previous report on a case of early colorectal cancer with synchronous multiple liver metastases.