[Metachronous Ovarian Metastasis of Colorectal Cancer at Our Hospital].

Among the cases that underwent primary tumor resection(PTR)of colorectal cancer at our hospital between January 2010 and December 2020, we examined 6 cases that involved ovarian metastasis(OM)surgery. The period from PTR to recurrence of OM was 2-28 months. Bilateral oophorectomy or bilateral salpingo-oophorectomy was performed in 5 cases, and unilateral oophorectomy was performed in 1. The reasons for surgery were symptom development and progressive disease. The period from recurrence of OM to OM surgery was short, that of 0-6 months. In 5 cases, peritoneal dissemination and other distant metastases were observed during OM surgery; R0 resection was performed in 2 cases. Postoperative complications associated with OM surgery were not observed. The median time required from the day of OM surgery to the resumption of chemotherapy was 33 days, and it was possible to resume chemotherapy early. The median survival time after OM surgery was approximately 11 months, which is considered to be owing to the influence of complications of peritoneal dissemination and other distant metastases.