Pathological evaluation of gastrointestinal endoscopic submucosal dissection materials based on Japanese guidelines

Figure 5 Ulcer scar vs biopsy scar. Biopsy scar is a very localized lesion (A and B) and is noted at the site of biopsy. Therefore, clinical information is important. On the other hand, ulcer scar due to tumor is usually an expansive lesion (C and D). Clinical information of no history of biopsy is also useful.