Pancreatic neuroendocrine tumors are a rare type of cancer that starts as a growth of cells in the pancreas. The pancreas is a long, flat gland that sits behind the stomach. It makes enzymes and hormones that help digest food.

Pancreatic neuroendocrine tumors start from the hormone-producing cells in the pancreas. These cells are called islet cells. Another term for pancreatic neuroendocrine tumor is islet cell cancer.

Some pancreatic neuroendocrine tumor cells keep making hormones. These are known as functional tumors. Functional tumors create too much of the given hormone. Examples of functional tumors include insulinoma, gastrinoma and glucagonoma.

Most pancreatic neuroendocrine tumors do not produce an excess amount of hormones. Tumors that don’t produce extra hormones are called nonfunctional tumors.

Pancreatic neuroendocrine tumors sometimes don’t cause symptoms. When they do, symptoms can include:

  • Heartburn.
  • Weakness.
  • Fatigue.
  • Muscle cramps.
  • Indigestion.
  • Diarrhea.
  • Weight loss.
  • Skin rash.
  • Constipation.
  • Pain in the abdomen or back.
  • Yellowing of the skin and the whites of the eyes.
  • Dizziness.
  • Blurred vision.
  • Headaches.
  • Increased thirst and hunger.

When to see a doctor

Make an appointment with a health care professional if you have any symptoms that worry you.

Pancreatic neuroendocrine tumors happen when cells in the pancreas develop changes in their DNA. A cell’s DNA holds the instructions that tell the cell what to do. The changes, which doctors call mutations, tell the cells to multiply quickly. The changes let the cells continue living when healthy cells would die as part of their natural life cycle. This causes many extra cells. The cells might form a mass called a tumor. Sometimes the cells can break away and spread to other organs, such as the liver. When cancer spreads, it’s called metastatic cancer.

In pancreatic neuroendocrine tumors, the DNA changes happen in hormone-producing cells called islet cells. It’s not clear what causes the changes that lead to cancer.

Factors that are associated with an increased risk of pancreatic neuroendocrine tumors include:

  • A family history of pancreatic neuroendocrine tumors. If a family member was diagnosed with pancreatic neuroendocrine tumor, your risk is increased.
  • Syndromes present at birth that increase the risk of tumors. Some syndromes that are passed from parents to children can increase the risk of pancreatic neuroendocrine tumors. Examples of these include multiple endocrine neoplasia, type 1 (MEN 1), von Hippel-Lindau (VHL) disease, neurofibromatosis 1 (NF1) and tuberous sclerosis. These inherited syndromes are caused by changes in the DNA. These changes allow cells to grow and divide more than needed.

There’s no way to prevent pancreatic neuroendocrine tumors. If you develop this type of cancer, you didn’t do anything to cause it.

Tests and procedures used to diagnose pancreatic neuroendocrine tumors include:

  • Blood tests. Blood tests may show excess hormones or other signs of a pancreatic neuroendocrine tumor. Blood samples also can be used to look for the DNA changes that signal an increased risk of these tumors.
  • Urine tests. A test of your urine may show breakdown products that happen when your body processes hormones.
  • Imaging tests. Imaging tests take pictures of the body. They can show the location and size of a pancreatic neuroendocrine tumor. Tests might include X-ray, MRICT and positron emission tomography, which also is called a PET scan.

     

    Imaging also might be done with nuclear medicine tests. These tests involve injecting a radioactive tracer into your body. The tracer sticks to pancreatic neuroendocrine tumors so that they show clearly on the images. The pictures are often made with a PET scan that’s combined with CT or MRI.

  • Creating images of your pancreas from the inside of your body. During an endoscopic ultrasound, a thin, flexible tube with a camera on the tip, called an endoscope, is passed down your throat. It passes into your stomach and small intestine. The tube has a special ultrasound tool to create pictures of your pancreas. Other tools can be passed through the tube to collect a sample of the tissue.
  • Removing a sample of tissue for testing, also called biopsy. A biopsy is a procedure to remove a sample of tissue for testing in a lab. The tissue might be removed during an endoscopic ultrasound. Sometimes surgery is needed to get the tissue sample. The sample is tested in a lab to see if it is cancer. Other special tests give more details about the cancer cells. Your health care team uses this information to make a treatment plan.
  • Collecting cells from other areas for testing. If cancer has spread to your liver, lymph nodes or other locations, a needle may be used to collect cells for testing.

Treatment for a pancreatic neuroendocrine tumor depends on the types of cells involved in your cancer, the extent and characteristics of your cancer, your preferences, and your overall health.

Options may include:

  • Surgery. If the pancreatic neuroendocrine tumor is only in the pancreas, treatment usually includes surgery. For cancers in the tail of the pancreas, surgery may involve removing the tail of the pancreas, called a distal pancreatectomy. This surgery leaves the head of the pancreas intact.

    Cancers that affect the head of the pancreas may require the Whipple procedure, also called pancreaticoduodenectomy. This surgery involves removing the cancer and part or most of the pancreas.

    If the cancer spreads to other parts of the body, surgery might be an option to remove it from those locations.

  • Peptide receptor radionuclide therapy, also called PRRT. PRRT combines a medicine that targets cancer cells with a small amount of a radioactive substance that’s injected into a vein. The medicine sticks to the pancreatic neuroendocrine tumor cells wherever they are in the body. Over days to weeks, the medicine delivers radiation directly to the cancer cells, causing them to die.

    One PRRT, lutetium Lu 177 dotatate (Lutathera), is used to treat advanced cancers.

  • Targeted therapy. Targeted therapy uses medicines that attack specific chemicals in the cancer cells. By blocking these chemicals, targeted treatments can cause cancer cells to die. Targeted therapy is used to treat certain advanced or recurrent pancreatic neuroendocrine tumors.
  • Radiofrequency ablation. Radiofrequency ablation involves applying energy waves to cancer cells using a special probe with tiny electrodes. Radiofrequency ablation causes the cancer cells to heat up and die. The probe may be inserted directly in the skin or through a cut in the abdomen.
  • Radiation therapy. Radiation therapy uses powerful energy beams to kill cancer cells. The energy comes from X-rays, protons or other sources. During radiation therapy, you lie on a table while a machine moves around you. The machine directs radiation to precise points on your body.
  • Chemotherapy. Chemotherapy uses strong medicines to kill cancer cells. It’s used in certain situations to treat pancreatic neuroendocrine tumors.

Treatment for cancer that spreads to the liver

Pancreatic neuroendocrine tumors most often spread to the liver. Several treatments exist for this, including:

  • Removing part of the liver. A surgeon might remove the part of the liver that has cancer. The rest of the liver can take over for the part that’s removed. In certain situations, it might be possible to remove the entire liver and replace it with a liver from a donor. This procedure is called a liver transplant.
  • Slowing blood flow to the liver. Slowing blood flow through the liver’s main artery, called the hepatic artery, can slow or stop cancer growth. Other blood vessels in the liver provide enough blood for the rest of the liver to keep working. Often, chemotherapy medicines or radioactive beads are used to block the artery. These methods slow the blood flow and deliver treatment directly to the cancer cells in the liver.
  • Destroying cancer cells with heat. Radiofrequency ablation is a procedure that uses energy waves to heat up cancer cells and cause them to die. It’s done using a special probe with tiny electrodes that’s inserted through the skin and into the liver. Energy waves pass through the probe and cause the tissue around it to heat up.
  1. Niederhuber JE, et al., eds. Cancer of the endocrine system. In: Abeloff’s Clinical Oncology. 6th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Feb. 27, 2023.
  2. Neuroendocrine and adrenal tumors. National Comprehensive Cancer Network. https://www.nccn.org/professionals/physician_gls/default.aspx. Accessed Feb. 27, 2023.
  3. Pancreatic neuroendocrine tumors (islet cell tumors) treatment (PDQ) — Patient version. National Cancer Institute. https://www.cancer.gov/types/pancreatic/patient/pnet-treatment-pdq. Accessed Feb. 27, 2023.
  4. Elsevier Point of Care. Clinical Overview: Functioning pancreatic neuroendocrine tumors. https://www.clinicalkey.com. Accessed Feb. 27, 2023.
  5. Fact sheet: What is peptide receptor radionuclide therapy (PRRT)? Society of Nuclear Medicine and Molecular Imaging. http://www.snmmi.org/AboutSNMMI/Content.aspx?ItemNumber=29883. Accessed Feb. 27, 2023.
  6. Neuroendocrine tumor of the pancreas. Cancer.Net. https://www.cancer.net/cancer-types/islet-cell-tumor/view-all. Accessed Feb. 27, 2023.
  7. NPF Centers of Excellence. National Pancreas Foundation. https://pancreasfoundation.org/patient-resources/npf-centers-of-excellence/. Accessed March 7, 2023.
  8. Ami TR. Allscripts EPSi. Mayo Clinic. May 15, 2023.
  9. About. National Comprehensive Cancer Network. https://www.nccn.org/home/about. Accessed March 7, 2023.
  10. Panda A, et al. Molecular radionuclide imaging of pancreatic neoplasms. The Lancet Gastroenterology & Hepatology. 2019; doi:10.1016/S2468-1253(19)30081-0.
  11. Kendi AT, et al. Therapy with 177Lu-DOTATE: Clinical implication and impact on care of patients with neuroendocrine tumors. American Journal of Roentgenology. 2019; doi:10.2214/AJR.19.21123.
  12. Strosberg J, et al. Phase 3 trial of 177Lu-Dotate for midgut neuroendocrine tumors. New England Journal of Medicine. 2017; doi:10.1056/NEJMoa1607427.
mobile

Ad

Women have unique health issues. And some of the health issues that affect both men and women can affect women differently.

Book your appointment TODAY!

Search on the closest Doctor to your location and book based on specialty. EARN 10 POINTS more with CuraPOINT.

BOOK
Edit Template