ABSTRACT
Periodic colonoscopic checkup is needed for patients suffering from colorectal cancer, based on the property that a colorectal neoplasm often recurs synchronously or metachronously. Surgical management appropriate to the occasion should be taken in recurrent colorectal cancer. Particularly, recurring colorectal cancer closely above the prior anastomosis for a low anterior resection should be eliminated by using an abdomino-perineal resection, including the preceding anastomotic site or a new anastomotic creation. Under the latter instance, ample possibility exists for postoperative anastomotic stenosis or leakage by reason of insufficient blood supply to the segment between the earlier anastomosis and the later one. The authors report two cases of re-anastomosis for colorectal cancer just above a previous anastomosis taken by a low anterior resection for rectal cancer. In a 52-year-old male with a history of neoadjuvant concomitant chemo-radiotherapy (CCRT) and low anterior resection for rectal cancer located at 6 cm from the anal verge, a new adenocarcinoma was detected 7 cm from the previous anastomotic site and 3 cm from the anal verge. Considering anal sphincter preservation, the re-anastomosis was made at the upper part of the preceding anastomosis. The patient experienced no surgical complications, such as anastomotic stenosis or leakage and functional defecation difficulty. In another patient, a 50-year-old male with a low anterior resection and adjuvant CCRT for rectal cancer 8 cm from anal verge, a new adenocarcinoma was detected in the colon. The new adenocarcinoma was located 10 cm from the anal verge and 8 cm from the previous anastomosis. The same surgical management was applied to this case, with the same postoperative result.