[Long-Term Disease-Free Survival after Chemoradiotherapy for Postoperative Local Recurrence of Rectal Cancer-A Case Report].

We report a case of a 63-year-old man with a perirectal abscess due to rectal cancer referred to us from another clinic. We performed 3 courses of preoperative chemotherapy using mFOLFOX6 and then performed a Miles operation plus D3 dissection followed by reconstruction of an artificial anus using the ileum. The pathological diagnosis was tub2, pAI(prostate), pN0 (0/12), ND(v+), and fStage Ⅲa. Dehiscence of the perineum wound area occurred 4 months after surgery, for which drainage was required. Local recurrence was then discovered by cytology. We administered mild 40 Gy radiation and chemotherapy using Bmab combined with mFOLFOX6. CT scans showed a significant reduction in the tumor and the tumor marker levels returned to within normal ranges. We then converted to Pmab plus FOLFIRI, which has been administered bimonthly for 3 years to date. The overall chemoradiotherapy duration has been about 5 years. Follow-up imaging findings continue to show sustained remission.