Figure 4.
Ectopic pancreas originates from the fourth sonographic layers of the gastric wall. (a) A subepithelial tumor with intact mucosa was identified at antrum. (b) Endoscopic ultrasonographic image obtained with a 12 MHz catheter probe. The tumor exhibits homogenous, hypoechoic echogenicity and distinct margin originating from the fourth sonographic layer of gastric wall (arrow).