Fig. 2.

A gastrointestinal stromal tumor (GIST) in a 65-year-old woman. (A) Endoscopic image showing a round subepithelial tumor in the lower body of the stomach. (B) Endoscopic ultrasonogram demonstrating a heterogenous isoechoic mass originating from the fourth layer. It is 3.5×3.0 cm in size and shows multiple internal hyperechoic spots and distinct margin. According to the nomogram, the sum of values is 209, corresponding to a risk probability of 0.994. This result strongly predicts the GIST.