"Pancreatic cancer" refers to a malignant neoplasm of the pancreas. The most common type of pancreatic cancer, accounting for 95% of these tumors is adenocarcinoma, which arises within the exocrine component of the pancreas. Less common types of pancreatic cancer include: neuroendocrine or islet cell tumors (Islet cells produce insulin for the body). Pancreatic cancer is the fourth most common cause of cancer death both in the United States and internationally. Pancreatic cancer often has a poor prognosis: for all stages combined, the 1- and 5-year relative survival rates are 25% and 6%, respectively; for local disease the 5-year survival is approximately 20% while the median survival for locally advanced and for metastatic disease, which collectively represent over 80% of individuals, is about 10 and 6 months respectively.