Pancreatic cancer

What is pancreatic cancer?

Pancreatic cancer starts in the pancreas. The pancreas is a gland that produces digestive juices and hormones. There are different types of pancreatic cancer.

How cancer starts

Cancer is when abnormal cells start to grow and divide in an uncontrolled way. The cells can grow into surrounding tissues or organs and may spread to other areas of the body.

Find out more about cancer and how it starts

The pancreas

The pancreas is part of the . It sits quite high up in your tummy (abdomen). And lies across your body where your ribs meet at the bottom of your breastbone, just behind your stomach.

Diagram showing where the pancreas is in the body in relation to the other organs. This includes the stomach, liver, bowel and gallbladder.

The pancreas is about 6 inches (15 centimetres) long and shaped like a leaf. It has 3 parts:

  • the wide end is called the head

  • the middle is called the body

  • the thin end is called the tail

Diagram showing 3 parts of the pancreas.

It is a that makes digestive juices and hormones, including .

Watch this 2 minute video to explain what the pancreas is.

How does the pancreas work?

The part of the pancreas which produces digestive juices is called the exocrine pancreas. The part which produces hormones is called the endocrine pancreas. The endocrine pancreas is much smaller than the exocrine pancreas.

Exocrine pancreas

The digestive system breaks up and digests food. Food starts to be broken down in your mouth when you chew it. It then travels down into your stomach where it it is broken down further by the juices in our stomach. After about 2 to 3 hours in the stomach, the partly digested food moves into the first part of the small bowel (duodenum).

When food reaches the duodenum, the pancreas releases digestive juices. The juices flow down small tubes in the pancreas called ducts. These join the main duct (pancreatic duct) and the juice flows into the duodenum to meet the food.

The pancreatic juices contain that help to break down the food into even smaller pieces. These pieces are then absorbed into the body through the small bowel.

The common joins the duodenum right next to the pancreatic duct. The place where the two ducts join and meet the duodenum is called the ampulla, or the ampulla of Vater.

Diagram showing the position of the pancreas and ampulla.

Very rarely cancer can start in the ampulla. Doctors call this ampullary cancer.

Read more about ampullary cancer

Endocrine pancreas

The endocrine pancreas makes insulin. Specialised cells within the pancreas release insulin directly into the bloodstream.

Insulin keeps the level of sugar (glucose) in the blood at a stable level. This means that the body cells get enough sugar, but not too much. The pancreas makes and releases more insulin if the level of sugar in the blood is high. If the level is too low, it doesn't release as much.

You have a condition called diabetes if you don't make enough insulin.

Where does pancreatic cancer start?

Cancer can start in the exocrine or endocrine part of the pancreas. Exocrine and endocrine cancers are different types of cancer. And they can behave differently and cause different symptoms.

Find out about the symptoms of pancreatic cancer

Most pancreatic cancers are exocrine pancreatic cancers. Rarely, cancer can start in the endocrine part of the pancreas. This type of cancer is called pancreatic neuroendocrine cancer.

Both types of pancreatic cancer can grow into nearby blood vessels or organs such as the small bowel. It can also spread further away in the body to areas including the liver and lungs.

Read about pancreatic neuroendocrine cancer

How common is pancreatic cancer?

Around 11,500 people are diagnosed with exocrine or endocrine pancreatic cancer in the UK each year. It is the 10th most common cancer in the UK.

Who gets pancreatic cancer?

Pancreatic cancer is more common in older people. Almost half of the people diagnosed are aged 75 and over. It is slightly more common in men than women.

In England, pancreatic cancer is more common in people living in more deprived areas.

The risk of developing pancreatic cancer is also higher in people who:

  • smoke

  • are overweight or obese

  • have a family history of pancreatic cancer or have certain inherited gene changes

  • have certain medical conditions including long term inflammation of the pancreas (chronic pancreatitis) or diabetes

Find out more about the risks and causes of pancreatic cancer

Last reviewed: 09 Jul 2026

Next review due: 09 Jul 2029

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