Prospective trial to investigate the nature of white opaque substance in colonic epithelial neoplasia as visualized by magnifying endoscopy with narrow-band imaging

INTERVENTION: Magnifying colonoscopy with narrow‐band imaging CONDITION: Colonic epithelial neoplasia PRIMARY OUTCOME: To investigate whether or not the presence of WOS within the superficial part of the colonic neoplasia is correlated with the presence of lipid droplets in the histological specimen. INCLUSION CRITERIA: 1. The patients with colonic cancer or adenoma which were subjected to endoscopic resection (polypectomy or EMR). 2. The patients whose ECOG performance status should be 0 or 1. 3. The patients with age or more 20 years old. 4. The patients who gave written informed consent