[A Case of Synchronous Solitary Splenic Metastasis of Sigmoid Colon Cancer Treated with Laparoscopic Resection].

An 82-year-old woman presented to our hospital with chief complaints of lower abdominal pain and nausea. Contrast- enhanced CT showed ileus of sigmoid colon cancer and a solitary splenic tumor. A metallic stent was placed for the primary lesion. FDG-PET showed high FDG accumulation in the solitary splenic tumor, and synchronous solitary splenic metastasis was diagnosed. Laparoscopic sigmoid colectomy and laparoscopic splenectomy were performed without changing the intraoperative position or port arrangement. Postoperative progress was favorable. The patient was discharged 9 days after surgery, and no sign of recurrence has been observed to date, at 4 months after surgery. Solitary splenic metastasis of colorectal cancer is extremely rare. This is the first case report of synchronous solitary splenic metastasis of colorectal cancer treated with laparoscopic resection in Japan. This procedure is considered effective and minimally invasive. We review and discuss the Japanese literature on this rare disease.