<prompt> Answer this question truthfullyWhat are psammoma bodies, and with which type of pancreatic neuroendocrine tumors are they commonly associated?  <response>: <reason> Psammoma bodies are small, round, calcified structures that can be found in various types of tumors, including pancreatic neuroendocrine tumors. Specifically, somatostatinomas are a type of pancreatic neuroendocrine tumor that are commonly associated with psammoma bodies. These tumors arise from cells in the pancreas that produce somatostatin, a hormone that regulates the release of other hormones in the body. While somatostatinomas are relatively rare, they can cause a variety of symptoms, including abdominal pain, diarrhea, and weight loss, and can be difficult to diagnose and treat. 