[A Case of R0 Resection of Locally Advanced Pancreatic Cancer Following Chemoradiation Therapy].

Patients with borderline resectable pancreatic cancer have a poorer prognosis than patients with resectable pancreatic cancer, but some cases treated with neoadjuvant chemoradiation therapy and radical surgery (R0 surgery) show long-term survival. A 72-year-old woman presented with a history of back pain and weight loss. Computed tomography revealed a cancer of the pancreatic body encasing the celiac trunk, common hepatic artery, and portal vein. After neoadjuvant chemotherapy ( S-1) and carbon-ion radiotherapy, the tumor was considered to be resectable. Distal pancreatectomy with en bloc celiac trunk resection (DP-CAR), portal vein resection, and reconstruction was performed. The histopathologic findings showed that the effect of NACRT was gradeⅡa (Evens' classification), and the surgical margins were histologically clear. S-1 was administered again for half a year as postoperative chemotherapy. With post-operative follow-up of 1 year and 1 month after surgery, the patient shows no signs of recurrent disease.