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About Cancer

Neuroendocrine cancer

Neuroendocrine cancers are a group of cancers that develop in cells of the neuroendocrine system. They can develop in different parts of the body, such as the stomach, bowel, pancreas or lungs.

You might also hear these cancers called ​. This means the same as neuroendocrine cancer.

There are 2 key groups of neuroendocrine cancer: 

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NETs and NECs are very different. So it is important to know which one you have. Talk to your doctor or specialist nurse if you are not sure.

What are neuroendocrine cancers?

Neuroendocrine cancers start in nerve and gland cells that make and release hormones (neuroendocrine cells). They can develop in different parts of the body, such as the stomach, bowel, lung or pancreas. The 2 main groups are neuroendocrine tumours (NETs) and neuroendocrine carcinomas (NECs).

Risks and causes of neuroendocrine cancer

We don't know what causes most neuroendocrine cancer. But we know there are some inherited conditions that can increase your risk.

Getting diagnosed with neuroendocrine cancer

You usually start by seeing your GP. They might refer you to a specialist doctor and organise tests.

Types of neuroendocrine cancer

There are many different types of neuroendocrine cancer. They are usually named after the part of the body where they develop.

Grades and stages of neuroendocrine cancer

A pathologist reports how abnormal the cancer cells look (differentiation) and how quickly they are growing (grading). Your stage is the size of the cancer and whether it has spread.

Carcinoid syndrome

Carcinoid syndrome is a group of symptoms including flushing of the skin and diarrhoea. It is caused by some NETs that produce large of amounts of hormones.

Last reviewed: 04 Feb 2025

Next review due: 04 Feb 2028

Page Credits: 

This section has been written, reviewed and updated by Cancer Research UK’s Patient Information Web Team. Thanks to the expert medical professionals and people affected by cancer who have helped to review this information.

  • Professor John Ramage, MD, MB BS, FRCP, Consultant Physician in Gastroenterology and Hepatology, King's College Hospital NHS Foundation Trust, London

  • Dr Wasat Mansoor, MBChB, MRCP, PhD, Consultant Medical Oncologist, The Christie NHS Foundation Trust, Manchester

  • Wendy Martin, MSc Healthcare Practice, BSc (Hons), DipHE, RGN, Kings College Hospital MHS Foundation trust, London

  • Suzanne Vickrage, Neuroendocrine Tumour Clinical Nurse Specialist Team Leader, Birmingham NET Centre

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