A 68-year-old man with a 15-mm subepithelial lesion (SEL) on the anteroinferior wall of the duodenal bulb, just distal to the pylorus (Fig. 1 a) was referred for further management. An endoscopic ultrasound (EUS) was performed, which identified a 15-mm oval-shaped, hypoechoic, submucosal lesion, with a finely inhomogeneous echostructure and peripheral vascular signals. Fine-needle biopsy (FNB) with a 22G Trident needle (Micro-Tech, Nanjing, China) confirmed the diagnosis of a neuroendocrine tumor (NET).
Cecinato et al. (Thu,) studied this question.
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