Islet cell carcinoma is an uncommon cancer of the endocrine pancreas. It accounts for approximately 1.3% of pancreatic cancer. It is also known as or nesidioblastoma. Pancreatic islet cell tumors can be benign or malignant. Islet cells produce many different hormones; most tumors release only one hormone that leads to specific symptoms. There are different types of islet cell tumor such as: Gastrinomas (Zollinger-Ellison syndrome), Glucagonomas, Insulinomas. Islet cell tumors are treatable even after they have metastasized. Symptoms include sweating, Headache, Hunger, anxiety, Double or blurry vision, pounding heartbeat, Diarrhea, Ulcers in the stomach and small bowel, Vomiting blood etc.