[A Case of Robot-Assisted Surgery after TNT for Advanced Rectal Cancer with Prostate Invasion].

A 60's man was admitted with melena. A colonoscopy was detected lower rectal cancer, and a enhanced CT scan revealed invasion of the prostate and enlarged left lateral lymph node. Total neoadjuvant therapy(TNT)considered of preoperative 7 courses of CAPOX followed by 5 Gy×5 short course RT, after treatment PET-MRI showed shrinkage of the tumor and left lateral lymph node, but invasion of the prostate was remained, preoperative diagnosis was ycT4b(AI:prostate) N3M0, ycStage Ⅲc. In collaboration with urologists, robot-assisted abdominoperineal resection with en bloc prostatec t omy and left lateral lymph dissection was performed. He exhibited a good post operative course and was discharged on the 17th postoperative day. Pathological examination revealed no tumor invasion into prostate and any lymph node metastasis, ypT3N0M0, ypStage Ⅱa.