Pancreatic cancer is a medical condition where mutated cells begin to proliferate among the normal, healthy cells of the pancreas. The mutated cells are referred to as cancerous because their growth is unprecedented. Their continual growth may lead to the formation of a tumor. With time, cancer cells developing in the pancreas cause problems with the production of hormones, digestive juices, and enzymes. Pancreatic cancer may develop as one of two illnesses. It can be cancer of the endocrine pancreas meaning it affects the part of the pancreas that produces insulin. Alternatively, the condition could be a cancer of the exocrine pancreas, meaning the cancerous cells are located within the part of the pancreas responsible for producing enzymes. The disease is usually manifests as discomfort in the upper area of the belly, loss of appetite or weight loss.