Understanding DCIS (Ductal carcinoma in situ)

This booklet is about ductal carcinoma in situ, usually called DCIS for short. DCIS is the earliest possible form of breast cancer.

DCIS is non-invasive. This means the breast cancer cells are contained in the ducts and lobules. They have not spread into surrounding breast tissue.

This booklet is for people who have DCIS. We hope it answers your questions and helps you deal with some of the feelings you may have. We cannot give advice about the best treatment for you. You should talk to your doctor, who knows your medical history.

DCIS can occur in both women and men, but it is very rare in men. 

Visit our online information about DCIS.