We reported two cases of colorectal cancer in whom effects and problems in the endoscopic ensnaring and high frequency current were investigated.
The first case was a 62-year-old man, who had received strip biopsy as an initial treatment for early cancer (IIa＋IIc) in the transverse colon. Histopathological study received well differentiated tubular adenocarcinoma with submucosal invasion (sm-massive invasion) . Transverse colon resection was performed as an additional treatment. At 6months after the operation, this patient had hepatic metastasis in the right lobe (S₇) and received hepatectomy. At 96months after the second operation, any finding of recurrent tumor was not seen.
The second case was 42-year-old woman, who had early rectal cancer (Is type, 22mm in diameter) . Endoscopic mucosal resection was done as an initial treatment, but was failed because of pain and difficulty of complete resection by the endoscopy. Anterior resection was performed and the resected specimen showed a large ulceration (ul-IV) , but showed no residual cancer in the rectum. All cancer cell might be burned completely by endoscopic ensnaring high frequency current.