Stages and grades

The stage of a neuroendocrine tumour (NET) tells you about its size and whether it has spread. The grade means how abnormal the cells look under a microscope.

The tests and scans you have to diagnose a large bowel or rectal NET give information about the stage and grade. This helps your doctor decide which treatment you need.


The stage tells you the size of a large bowel or rectal NET and whether it has spread.

Grades and the Ki-67 index

The grade and the Ki-67 index gives your doctor an idea of how the NET might behave and whether it is likely to spread.

Last reviewed: 
16 Jun 2021
Next review due: 
16 Jun 2024
Json LD: 
Coronavirus and cancer

We know it’s a worrying time for people with cancer, we have information to help.

Read our information about coronavirus and cancer