The charity says: “Pancreatic neuroendocrine tumours that produce hormones are called functional tumours.
“The symptoms are different for each type, depending on the hormone the tumour produces.”
Pancreatic cancer UK says: “Some people see their GP several times before getting a diagnosis.”
The charity adds: “If you have unexplained symptoms that last four weeks or more, go back to your GP until you get a firm diagnosis, or a referral for tests to find out what’s causing them.”