Fig. 4.
Detection of intratumoral vessels in gastrointestinal stromal tumor by contrast-enhanced harmonic endoscopic ultrasound (CH-EUS). (A) Fundamental B-mode EUS shows a low echoic mass. (B) A vessel image of CH-EUS demonstrating irregular vessel subepithelial intratumoral vessels (arrow heads) originating peripherally and extending centrally into the tumor.
