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

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