Abstract
In the diagnosis of colorectal sessile tumor, it is the most important to differentiateinvasive submucosal cancer(sm-m cancer)from cancer with scanty sm invasion(sm-s ca)Accuracy of endoscopic evaluation as for the depth of invasion was studied. The subjectswere 109 colorectal sessile tumors that were treated for the past 6 years. The followingparameters were studied;size, irregularity of the surface, easy bleeding, erosion andredness in color. In conclusion, According to the advance of the invasion, the following three findingswere increased;irregularity of the surface, easy bleeding, erosion.The difference inirregularity between sm-s ca and sm-m ca was significant(p=0.05).These three findings(irregularity of the surface, easy bleeding, erosion) of tumor seemed to make it possible toevaluate the depth of colorectal sessile tumors endoscopically.
