Prospective Endoscopic Ultrasonographic Evaluation of the Frequency of Nonfunctioning Pancreaticoduodenal Endocrine Tumors in Patients with Multiple Endocrine Neoplasia Type 1

The frequency of nonfunctioning pancreatic endocrine tumors is higher (54.9%) than previously thought. The size and number of these tumors can increase over time. Pancreatic EUS should be performed once MEN1 is diagnosed to monitor disease progression.