A Curious Peripancreatic Mass: A Case of an Exophytic Pancreatic Neuroendocrine Tumor

Abstract

Pancreatic neuroendocrine tumors (PanNETs) are usually located entirely within the pancreatic parenchyma. However, unusual exophytic or pedunculated PanNETs are sometimes discovered in imaging studies, requiring differential diagnosis with various peripancreatic tumors and non-tumors. Herein, an exophytic PanNET whose origin was identified only after the surgical exploration is presented along with the potential radiologic differential diagnosis.