Risk Factors for Unfavorable Outcomes After Endoscopic Removal of Submucosal Invasive Colorectal Tumors

Tumor infiltration of lymphatic vessels is the greatest risk factor for an unfavorable outcome after endoscopic resection for colorectal carcinoma. However, its positive predictive value is low. The decision to perform surgery after endoscopic resection of T1 colorectal cancers should be made on the basis of specific features of each patient.