What are neuroendocrine cancers?

Neuroendocrine cancers are rare cancers that develop in the neuroendocrine system. They are also called neuroendocrine neoplasms (NENs). There are 2 key groups - neuroendocrine tumours (NETs) and neuroendocrine carcinomas (NECs).

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. 

Treatment for neuroendocrine cancer

Treatment depends on the type of neuroendocrine cancer you have, where it is, its size and whether it has spread (the stage).

Carcinoid syndrome

Carcinoid syndrome is a group of symptoms that some people get when they have a neuroendocrine tumour (NET). These symptoms happen when the tumour makes large amounts of hormones.

Lung neuroendocrine tumours (NETs)

Lung NETs are rare cancers that start in the neuroendocrine cells of the lung. Some types of lung NETs are called carcinoid tumours.

Stomach neuroendocrine cancer

Stomach neuroendocrine cancers start in the neuroendocrine cells of the stomach. Neuroendocrine cells in the stomach help control the release of digestive juices and how fast food moves through the stomach.

Small bowel neuroendocrine tumours (NETs)

Small bowel NETs are rare. These tumours start in the neuroendocrine cells of the small bowel.

Large bowel and rectal neuroendocrine tumours

Large bowel and rectal NETs are rare cancers that start in the neuroendocrine cells. Some types of NETs are called carcinoid tumours.

Neuroendocrine tumours of the pancreas

There are different types of NETs of the pancreas. They are usually grouped into functioning NETs and non functioning NETs.

Merkel cell carcinoma (MCC)

 MCC is a rare type of skin cancer that starts in Merkel cells. Its is also called a type of neuroendocrine tumour (NET). 

Living with NETs

Get practical and emotional support to help you cope with a neuroendocrine tumour.

Last reviewed: 
04 Feb 2025
Next review due: 
04 Feb 2028