Diagnostic role of endoscopic ultrasonography in defining the clinical features and histopathological spectrum of gastroenteropancreatic neuroendocrine tumors

Figure 1 Endoscopic ultrasound demonstration of neuroendocrine tumors at various gastrointestinal sites in different patients. A: Pancreatic mass located in the head region; B: Well-defined, vascularized porta hepatis mass; C: Hypoechoic mediastinal mass; D: Multiple hyperechoic enhancing liver lesions.