[A case of colorectal cancer with pelvic recurrence treated by systemic chemotherapy and radiotherapy].

A 63-year-old man who had a history of rectal cancer and was treated with low anterior resection in February 2006, presented with liver metastases in September 2007 and underwent right anterior sectionectomy of the liver. He developed a pelvic wall recurrence with buttock pain in September 2009. This was treated with conventional radiation therapy and Cyber- Knife. The buttock pain was relieved after CyberKnife treatment and the patient received systemic chemotherapy in the outpatient clinic. Subsequently, he developed a left sacral recurrence with buttock pain and gait disturbance in August 2013. Since the tumor was located close to the field previously subjected to radiotherapy, we opted for CyberKnife treatment again. Although the pain subsided, our patient died of lymphangitic carcinomatosis in April 2014, 7 years and 2 months after the surgery. In this case, CyberKnife was effective in treating pelvic recurrence with pain, and thus, may have a significant role to play in the multidisciplinary treatment of metastatic colorectal cancer.