What is the role of EUS in pancreatic neuroendocrine tumors (PNETs)?
EUS is an integral part of both detecting and diagnosing PNETs with 77% to 94% sensitivity for detecting them. When abdominal CT scan is negative for PNET, EUS is more than 70% sensitive for detecting it. EUS is superior to CT scan for small (< 2 cm) PNETs and insulinomas. EUS-FNA is nearly 90% sensitive for diagnosing these tumors.