[A Case of Uterine Body Metastasis from Sigmoid Colon Adenocarcinoma].

We report a case of metastatic carcinoma to the uterine body from a colorectal adenocarcinoma. A 73-year-old woman underwent laparoscopic sigmoidectomy for sigmoid colon carcinoma 2 years before. In the following study, her serum carcinoembryonic antigen level was elevated, and a uterine body tumor invading the rectal wall was detected via enhanced computed tomography. Colonoscopic examination revealed an elevated lesion at the rectum, which was diagnosed as an adenocarcinoma. Based on these results, we diagnosed the uterine tumor as metastatic tumor from the colon carcinoma. Immunostaining was negative for CK7, but positive for CK20. Thus, we confirmed metastasis of the sigmoid colon cancer to the uterus. Metastasis to the female genital tract from extragenital malignancies are rare, and the prognosis is extremely poor. However, some patients attain long-term survival by surgical intervention even in such cases.