Endoscopic mucosal resection with circumferential mucosal incision of duodenal carcinoid tumors

Figure 1 Endoscopic and endoscopic ultrasonography findings. A: Endoscopic image showing an elevated lesion in the anterior wall of duodenal bulb; B: Endoscopic ultrasonography image of the lesion, a 3 mm hypoechoic mass lesion that was located in the submucosal layer.

Figure 2 Endoscopic image showing the endoscopic mucosal resection with circumferential mucosal incision procedures. A-C: The entire lesion was removed en bloc.

Figure 3 Histopathologic assessment of the resected specimen. A: Macroscopic view of the resected specimen; B: Well-differentiated neuroendocrine tumor was confined to the submucosa (hematoxylin and eosin, original magnification × 20).