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Cancer InDepth: Pancreatic Cancer
by Rosalyn Carson-DeWitt, MD and Michael Jubinville, MPH
Cancer is a disease in which cells grow in an abnormal way. Normally, the cells divide in a controlled manner. If cells keep dividing when new cells are not needed, a mass of tissue called a tumor forms.
A tumor can be benign or malignant. A benign tumor is not cancer and will not spread to other parts of the body. A malignant tumor is cancer and will invade and damage the tissue around it. The cancer cells can also enter the lymph and blood streams, spreading to other parts of the body. Pancreatic cancer is the development of malignant cells in the pancreas.
Normal Anatomy and the Development of Pancreatic Cancer
The pancreas is an organ that sits behind and to the right of the stomach. It is near the liver, gallbladder, and intestines and is an important part of the digestive system. It plays a crucial role in the body’s ability to process food, making it able to generate and use energy.
Sections of the pancreas:
The pancreas is made up of two different types of cells, endocrine and exocrine. Each cell type has a different function. The endocrine, or islet cells, produce a number of different chemicals called hormones. Hormones enter the bloodstream and travel throughout the body. They help manage a number of body functions and balance how the body works. For example, the pancreas makes insulin. This hormone breaks down and uses or stores sugars from food.
The exocrine cells of the pancreas make digestive juices that help break down food in the small intestine. The juices travel from the pancreas through a system of ducts into the small intestine. These digestive juices help process fat, protein, and carbohydrates in food.
Pancreatic cancer tumors can cause blockages in the pancreas. If digestive juices and/or insulin are blocked, it is possible to not get enough nutrition even when eating normally. If the tumor grows beyond the pancreas, the cancer can pass into nearby structures, such as the intestines, liver, or stomach. The cancer can cause damage and interfere with their function as well. The cancer can also spread to lymph nodes or blood vessels, which can carry cancer cells to other areas of the body. The most common sites for pancreatic cancer to spread to are the lining of the abdominal cavity, liver, and lungs.
Types of Pancreatic Cancer
There are several different types of pancreatic cancer based on the specific type of cells and where the cancer starts. Types of pancreatic cancers include:
This fact sheet focuses on ductal adenocarcinoma of the pancreas.
General information about pancreatic cancer. National Cancer Institute website. Available at: https://www.cancer.gov/types/pancreatic/patient/pancreatic-treatment-pdq#link/_110. Updated December 23, 2016. Accessed March 13, 2017.
Pancreatic cancer. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T114527/Pancreatic-cancer. Updated July 6, 2016. Accessed March 13, 2017.
Pancreatic cancer. Merck Manual Professional Version website. Available at:
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Updated January 2017. Accessed March 13, 2017.
What is pancreatic cancer? American Cancer Society website. Available at: https://www.cancer.org/cancer/pancreatic-cancer/about/what-is-pancreatic-cancer.html. Updated May 31, 2016. Accessed March 13, 2017.
Last reviewed September 2017 by EBSCO Medical Review Board Mohei Abouzied, MD, FACP
Last Updated: 3/13/2017
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