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NCCN Guidelines for Patients
Breast Cancer - Carcinoma in Situ
, Version 1.2016
What is stage 0 breast cancer?
Stage 0 breast cancer includes LCIS (
itu) and DCIS (
itu). These terms can be unclear because LCIS isn’t cancer but DCIS is.7
LCIS is an abnormal growth of cells within the breast parts that make breast milk.
DCIS is breast cancer that hasn’t grown outside of the milk ducts in the breast.
Does LCIS need to be treated?
The tumor will be removed and tests will be done to confirm there’s no cancer.15
If you are likely to have breast cancer in the future, you may want to reduce your chances
by 1) making changes in your lifestyle, 2) taking treatment that stops cancer growth caused
by hormones (endocrine therapy), or 3) if at high-risk, have your breasts removed.16
Breast exams by your doctor and yourself as well as pictures of the insides of your breasts,
called mammograms, are advised so as to find any cancer early.18
What health care do I need before treatment for DCIS?
A report of your health history and an exam of your body23
Pictures of the insides of your breasts by a mammogram and maybe MRI23
Test for a marker—estrogen receptors—within breast cancer cells24
Advice on genetic tests if breast cancer risk was likely passed down from your parents25
NCCN Quick Guide
This NCCNQuick Guide
sheet summarizes key points from the completeNCCN Guidelines for Patients ® : B
reast Cancer – Carcinoma in Situ
These guidelines explain which tests and
treatments are recommended by experts in cancer. To view and download the guidelines, visitNCCN.org/patients
or, to order printed copies, visitAmazon.com.
Carcinoma in Situ