Ovarian metastasis from adenocarcinoma of the rectosigmoid colon

Background: Approximately 12-14% of females affected with primary colorectal carcinoma have synchro-nous or metachronous metastatic ovarian lesions, i.e., metastatic colon carcinoma to the ovary (MCCO). MCCO most commonly affects both ovaries. Unilateral MCCO is a very unusual occurrence. Case Report: Here, we present a case of a 52-year-old postmenopausal woman with unilateral right ovarian metastases from a rectosigmoid adeno-carcinoma. The patient had nonspecific symptoms at the diagnosis, including abdominal distension, malaise, and gradual weight loss. Radiology (CT and MRI) revealed a big tumor of the right ovary synchronous with the circum-ferential thickening of the rectosigmoid colon. Total abdominal hysterectomy, bilateral salpingo-oophorectomy, and omentectomy together with anterior resection of the rectosigmoid colon were performed. The diagnosis of ovarian metastases from a primary rectosigmoid adenocarcinoma was confirmed by immunohistological examination of the ovarian mass and rectosigmoid thickening. We did not find any evidence of peritoneal deposits or metastases in the regional lymph nodes. The patient died shortly after surgery from a postoperative cardiac event. Conclusions: This paper presents a rare example of unilateral MCCO. The clinicopathological characteristics were discussed, and a brief review of the literature. Although unilateral MCCO is a rare occurrence, physicians should keep it in mind whenever ovarian, and colorectal tumors appear simultaneously.