label: Pancreatic Serotonin-Producing Neuroendocrine Tumor
label_lc: pancreatic serotonin-producing neuroendocrine tumor
description: "A pancreatic neuroendocrine tumor that secretes serotonin. When it metastasizes to the liver or retroperitoneum, it produces the carcinoid syndrome. Most cases are graded G1 or G2."