[A Case of Recurrent Small Bowel Cancer That Successfully Responded to Chemoradiation Therapy].

Primary small bowel cancer is a rare entity; thus, it is often found in progress. Therefore, the prognosis is often poor. Because of its low frequency, there are few reports concerning the treatment for small bowel cancer; hence, it is important to examine individual cases in detail. In this study, we present a case of recurrent small bowel cancer that successfully responded to chemoradiation therapy. Case: A 48-year-old woman had anemia. Colonoscopy showed a tumor in the terminal ileum. Because of invasion in the ovaries and uterus, ileocecal resection, hysterectomy, and bilateral adnexectomy were performed. The pathological diagnosis was small bowel cancer with lymph node metastasis, and CapeOX therapy was administered as postoperative adjuvant chemotherapy. Since local recurrence was detected in the right lower quadrant 6 months after the surgery, IRIS plus BV was initiated. Radiation therapy(2Gy×25 times, total 50 Gy)was also administered within the same period(only S-1 administration during radiation). After radiation therapy, the tumor decreased significantly in size and showed CR. Currently, the patient is under observation without treatment, but she has had no recurrence for 6 years after the confirmation of recurrence(6 years and 6 months after surgery). It is extremely rare for chemoradiation therapy to be effective for recurrent small bowel cancer; we report such a case with literatures.