What is cervical intra-epithelial neoplasia (CIN)?

Cervical intra-epithelial neoplasia (CIN) is a term that describes changes in the squamous cells of the cervix.

CIN is not cancer, but you may need treatment to stop cervical cancer developing. You may hear doctors call CIN a pre-cancerous condition.

You might not need treatment for CIN. If you do need treatment, it’s usually simple and very successful.

Causes of CIN

We don’t know all the causes of CIN. But they include human papilloma virus (HPV) and smoking.


Women who smoke are almost twice as likely to develop CIN as non-smokers.

Symptoms of CIN and HPV

CIN and HPV on the cervix have no symptoms. It’s essential for women to have regular cervical screening tests to find any early cell changes.

The more people I spoke to about it, the more common I suppose it was. Everybody I spoke to had had abnormalities at some time.

Melanie, affected by cancer