Tu1470 Clinicopathological Features of Laterally Spreading Tumor of the Colorectum : References Among Subtypes and Submucosal Invasion

Abstract

Laterally spreading tumors (LSTs) are usually good indication for endoscopic treatment because they are rather benign in spite of their large diameter. There are four subtypes in LSTs; granular type (homogeneous type (H) / nodular mixed type (M)), and non-granular type (flat-elevated type (F) / pseudo-depressed type (PD)). Their pathological features are different among subtypes. The aim of this study is to evaluate the clinicopathologial features of LSTs focusing on their subtypes and submucosal(SM) invasion.