Figure 2.

Endoscopic ultrasound (EUS) images of gastrointestinal stromal tumor (GIST) of the stomach: (a) The originating layer is visible when the ultrasound transducer is placed at the peripheral portion of the lesion. (b) Contrast-enhanced harmonic EUS (CH-EUS) demonstrated a hypervascular pattern. Moreover, CH-EUS allowed for the identification of irregular large vessels and avascular areas inside the tumor. (c) EUS-guided fine-needle biopsy was performed using a 22-gauge end-cutting needle while trying to avoid avascular areas previously defined using CH-EUS. Histology confirmed a GIST with a high replicative index.