[A Resected Case of Metachronous Solitary Splenic Metastasis of Sigmoid Colon Cancer].

We report a case of solitary splenic metastasis after surgery for colon cancer. 75-year-old woman who underwent sigmoidectomy for sigmoid colon cancer. After undergoing adjuvant CAPOX therapy, the splenic mass was identified 18 months postoperatively. Postoperative chemotherapy has been resumed, and the patient is under observation. Splenic metastasis of malignant tumors is considered relatively rare. There are scattered reports indicating the effectiveness of resection for isolated splenic metastasis, but adjuvant therapy postoperatively is considered necessary.