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Lung cancer health centre

What grade is your lung cancer?

BMJ Group Medical Reference

Doctors may examine a sample of your lung cancer under the microscope. This helps them grade the cells according to how they look.

Healthy lung cells are described by doctors as well differentiated. This means they look like other healthy lung cells and have all the parts they need to work normally. Lung cancer cells don't look and work like healthy lung cells. They are called less well differentiated.

Lung cancers are graded as shown in the table below. The grade of your cancer indicates how fast it is likely to grow. G1 is the slowest. G4 is the fastest.

GXGrade has not been assessed.
G1Lung cancer cells are well differentiated.
G2Lung cancer cells are moderately differentiated.
G3Lung cancer cells are poorly differentiated.
G4Lung cancer cells are undifferentiated.


For references related to Lung cancer click here.
Last Updated: September 27, 2013
This information does not replace medical advice.  If you are concerned you might have a medical problem please ask your Boots pharmacy team in your local Boots store, or see your doctor.

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