Abnormal cell growth starts to form tumors in the pancreas, a small organ located deep in the belly, behind your stomach.
There are two main types of pancreatic tumors: exocrine and endocrine. The type of tumor depends on which type of cells are involved. Exocrine ("EX-oh-krin") cells make digestive juices. Endocrine ("EN-doh-krin") cells make insulin. Most people with pancreatic cancer have exocrine tumors, which grow faster than endocrine tumors.