ABSTRACT
objective The consequences of macroscopic classification for early colorectal cancer(CRC),carried out by clinicians from China and Japan,were compared.Methods The endoscopic color photos and related materials of 7 selected patients with early CRC were distributed to each of 5 endoscopists from China and Japan to present everyone's own idea on classification.Results Some lesions assumed as typeⅡ (flat pattern) by Japanese were considered as typeⅠ (elevated pattern)by Chinese.While the lesions having protrusion with central depression were depicted by physicians of both sides according to the ratio of areas with different outlook,namelyⅡ a＋Ⅱ c orⅡ c＋Ⅱ a.Some new terms have been adopted currently by Japanese only,such asⅡ a＋ depression,LST(laterally spreading tumor).Conclusion Regarding the macroscopic classification indices for early CRC discrepancies exist between Sino-Japanese doctors.More comments and cooperation seem necessary to set up an unified criterion.