Case Report
Copyright ©2014 Baishideng Publishing Group Co.
World J Gastroenterol. Apr 28, 2014; 20(16): 4817-4821
Published online Apr 28, 2014. doi: 10.3748/wjg.v20.i16.4817
Figure 1
Figure 1 A submucosal tumor with central ulceration at the ampulla of Vater.