COMPLICATION OF ENDOSCOPIC BIOPSY FOR SUPERFICIAL COLORECTAL TUMOR

Abstract

We experienced 5 cases of superficial colorectal tumor that were defficult to perform EMR. Five cases include II a, II a+II c, and LST. All these tumors had been previously performed endoscopic biopsy. On the next endoscopic study to perform EMR, tumors accompanied converging folds or depression which formerly not seen. They all had non-lifting sign. Surgical resection was carried out in 1 case and EMR in 4 seses. Pathological-ly all 4 specimens of EMR cases contained proper muscle layer to some extent and perforated in 1 case. The tumors were intramucosal carcinoma in 1 case, adenoma in 4 cases. Hawever all 5 tumors were intramural lesions, they all had remarkable fibrous change in the submucosal layer. That change made EMR defficult and might have been the result of former biopsy procedure. We conclude that biopsy should not be carried out before EMR if the colorectal tumor is superficial and submucosal invasion is unlikely on endoscopic finding.