A 48-year-old menopausal woman, complaining of an abdominal tumor and hypogastric pain, visited our hospital. Colonoscopy revealed a 1cm Isp polyp at the sigmoid colon. A biopsy proved it to be adenocarcinoma. An abdominal CT showed large bilateral ovarian tumors composed of multilocular cysts and a liver cystic tumor similar to them. The CEA value was high. Laparotomy findings revealed a single dissemination near the sigmoid colon. Intraoperative pathological diagnosis revealed that the ovary and liver tumors were adenocarcinoma, so we thought these lesions were metastases from the colon cancer. Sigmoidectomy, D3 lymph node dissection, total hysterectomy, bilateral oophorectomy and resection of dissemination nodule were performed. The post-operative pathological findings revealed that the degree of penetration of the sigmoid colon cancer was the submucosal layer. Though chemotherapy and partial resection of the liver were performed, she died of cancer two years and 3 months after the operation. Metastatic ovarian cancer from the colorectum is not rare, and the prognosis is poor. Though primary colorectal cancers that metastatic to the ovaries are usually advanced, ovarian metastases from SM colorectal cancer can occur. When a SM colorectal cancer companies peritoneal dissemination and/or morphological change of the ovaries, bilateral oophorectomy is recommended.
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