Figure 1
From: Endoscopic resection of duodenal bulb neuroendocrine tumor larger than 10 mm in diameter
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-230X-11-67/MediaObjects/12876_2010_Article_597_Fig1_HTML.jpg)
Endoscopic findings of the duodenal neuroendocrine tumors. A, B, C, D. Semipedunculated elevation accompanied by an irregularly shaped erythematous central depression (A: patient 1; B: patient 2; C: patient 3; D: patient 4).