Clinical outcomes of ampullary neoplasms in resected margin positive or uncertain cases after endoscopic papillectomy

Figure 2 Ampullary adenoma. A: Ampullary adenoma with vertical margin positive. Tumor is present at resected vertical margin. (black arrow). (left) hematoxylin and eosin, loupe image. (right) hematoxylin and eosin × 100. B: Ampullary adenoma with vertical margin uncertain. Tubular gland is present at resected vertical margin, but it cannot distinguish whether or not the tumor exists because of thermal denaturation (black arrow). (left) Hematoxylin and eosin, loupe image. (right) Hematoxylin and eosin × 100.