Does this test have other names?
Plasma pancreatic polypeptide, PP, human pancreatic polypeptide
What is this test?
This test measures a substance in your blood called pancreatic polypeptide. Pancreatic
polypeptide is secreted by special cells in your pancreas.
People who have neuroendocrine tumors (NETs) have higher levels of this substance.
These tumors can be functional or nonfunctional. Nonfunctional tumors are more common.
They are called nonfunctional because they secrete substances that do not cause symptoms.
That means they may not cause any symptoms until they have grown large.
Why do I need this test?
You may need this test if your healthcare provider suspects that you have a pancreatic
NET. When these tumors cause symptoms, they can seem similar to many other common
digestive problems. Symptoms of nonfunctional pancreatic NETs include:
If you have already been diagnosed with a pancreatic NET, you may need this test to
help your healthcare provider decide on the best treatment for you.
What other tests might I have along with this test?
Your healthcare provider may also order other tests to look for other substances in
your blood that rise if you have a pancreatic NET. These substances are called biochemical
Your provider may also order an imaging test that takes a picture of your pancreas.
He or she may also suggest you have a biopsy. This involves taking out a small piece
of the tumor and looking at it under a microscope.
What do my test results mean?
Test results may vary depending on your age, gender, health history, the method used
for the test, and other things. Your test results may not mean you have a problem.
Ask your healthcare provider what your test results mean for you.
Pancreatic polypeptide is measured in picograms per milliliter (pg/mL).
A high blood level may mean you have:
How is this test done?
The test is done with a blood sample. A needle is used to draw blood from a vein in
your arm or hand.
Does this test pose any risks?
Having a blood test with a needle carries some risks. These include bleeding, infection,
bruising, and feeling lightheaded. When the needle pricks your arm or hand, you may
feel a slight sting or pain. Afterward, the site may be sore.
What might affect my test results?
Eating before the test will cause pancreatic polypeptide levels to rise.
How do I get ready for this test?
You will likely need to not eat or drink anything except water for a period of time
before this test. Talk with your healthcare provider about this. Tell your healthcare
provider about all medicines, herbs, vitamins, and supplements you are taking. This
includes medicines that don't need a prescription and any illegal drugs you may use.