[Aim]This study was aimed at clarifying the appropriateness of planned endoscopic piecemeal mucosal resection for mucosal colorectal cancers. [Method] Forty one patients with mucosal colorectal cancer over 30mm in size undergoing planned endoscopic piecemeal mucosal resection at our institute between 1995 and 2000 were selected. In a retrospective study the usefulness of this treatment was analyzed. [Result] The average maximum diameter of the tumor was 42.2mm. The tumors were located in the rectum in 24 patients, the sigmoid colon in 14, the descending colon in 2, the transverse colon in 2, the ascending colon in 7 and the cecum in 3. Villous tumors were seen in 26, nodule-aggregating lesions in 9, mixed type in 3, Ip in 2 and lla in 1. Of 41 patients, resection was performed by one session in 36 and by multiple sessions in 5. As post-operative complication, bleeding were noted in 4 patients. Surgical resection was performed in 2 patients. Of 39 patients with complete endoscopic resection, residual tumors were seen in 9 patients and the recurrent tumor in 1 . All residual and recurrent tumors were resected by endoscopy. [Conclusion] The judgment of complete endoscopic resection is not always accurate . Unless recurrence is seen, the possibility of curative resection seems high. Furthermore residual and recurrent tumors can be resected again by endoscopy. Planned endoscopic piecemeal mucosal resection is thought be useful and should to be adopted for mucosal colorectal cancers aggressively.
View full abstract