Neuroendocrine Tumor

What Neuroendocrine Tumors Are

Neuroendocrine tumors (NETs) are growths that come from neuroendocrine cells—special cells that release hormones into the blood when they receive signals from the nervous system. These cells are found in many parts of the body, including the pancreas, lungs, digestive tract, and other organs. NETs can be benign (not cancer) or malignant (cancer). Some common types include carcinoid tumors, islet cell tumors of the pancreas, medullary thyroid cancer, and certain lung cancers like small cell lung cancer.

Why Neuroendocrine Tumors Matter in Cancer Care

NETs are important because they may produce excess hormones, leading to symptoms such as flushing, diarrhea, or wheezing. Their behavior can range from slow-growing to aggressive cancers. Treatment options vary depending on the tumor’s location, size, hormone production, and whether it has spread. Some targeted medicines, like Afinitor (which contains everolimus), can help slow tumor growth by blocking proteins that tumors need to grow. Procedures like arterial embolization may also be used to cut off blood supply to tumors in organs such as the liver or kidneys.

What Patients Might See or Hear About Neuroendocrine Tumors

You might hear the term NET in your medical reports, treatment plans, or during discussions with your care team. It may be mentioned alongside other terms like carcinoid tumor or specific cancer types depending on where the tumor is located. Because NETs can produce hormones, your care team may monitor symptoms related to hormone levels. You might also hear about treatments like Afinitor or procedures like arterial embolization as part of managing NETs.

Where the Term Appears in Care

NETs can be referenced in biopsy reports, imaging results, treatment plans, or clinical trial information. They may also appear in notes about related conditions, such as atrophic gastritis, which can increase the risk of certain gastrointestinal NETs. Understanding where and how the term is used in your records can help you ask informed questions about your care.

What Neuroendocrine Tumor Does Not Automatically Mean

Hearing the term NET does not mean you have a specific diagnosis or that a particular treatment is planned. NETs vary widely in behavior and treatment options. Some are slow-growing and may not require immediate treatment, while others may be more aggressive. The term alone does not indicate prognosis or treatment success. Always ask your care team what the term means for your individual case.

How to Use This Information and Next Steps

This information is meant to help you understand what neuroendocrine tumors are and why they matter in cancer care. It does not replace advice from your healthcare providers. If you see this term in your medical records or hear it during visits, the best next step is to ask your care team to explain what it means for your diagnosis, treatment options, and follow-up care. Understanding your specific situation will help you feel more confident and involved in your care decisions.