Tumor size discrepancy between endoscopic and pathological evaluations in colorectal endoscopic submucosal dissection

Figure 2 Representative cases of incorrect scaling. A: Underscaling case. The tumor size was evaluated as 30 mm; B: Pathology revealing the maximal diameter as 49 mm, wherein the size discrepancy was -39%; C: Overscaling case. The cancerous lesion was evaluated as 20 mm; D: The pathological size was 15 mm, resulting in a size discrepancy of 33%.