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NCCN Guidelines for Patients


Breast Cancer - Carcinoma in Situ

(stage 0)

, Version 1.2016

LCIS isn’t cancer but a group of

abnormal cells within breast lobules.

However, having had LCIS increases

your chances for getting breast

cancer. Part 2 presents the health

care that is advised for women with


The health care that is addressed in Part 2 should

follow a diagnosis of LCIS. LCIS can only be

diagnosed by a pathologist who has examined tissue

from your breast. A pathologist is a doctor who’s an

expert in testing cells to find disease. Following a

LCIS diagnosis, other tests are needed to further

assess the health of your breasts. Read the section

Health tests

to learn more.

A risk factor is anything that increases your chances

of an event. LCIS is one of many risk factors for

breast cancer. In the section

Risk-reduction treatment


the decision process of and the ways to reduce the

risk of breast cancer are briefly described.

Breast cancer screening is advised for women who’ve

had LCIS. The aim of screening is to find any cancer

early when treatment will work best. There is more

than one method to screen for breast cancer. Read

the section

Breast cancer screening

to learn more.


Treatment guide:


13 Health tests

16 Risk-reduction treatment

18 Breast cancer screening

20 Review