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By Women,
For Women

Straight talk about breast density and screening,
physician approved & backed by science.


That You Know Your


(SCROLL DOWN to learn more)


Your breasts are made up
of 2 main types of tissue


glandular which is dense
fatty which is not dense


The proportion of those two in your breast
will determine your breast density

Be Breast Smart
Who Cares?

Why do I care about breast density?

  • The more dense your breasts are, the higher your risk of breast cancer.
  • Dense breast tissue on a mammogram is white. Cancer also appears white on a mammogram. Therefore, the more dense tissue you have the more difficult it is for the mammogram to find the cancer.
  • perfect stormThis creates THE PERFECT STORM that might leave cancer undetected . . . and left to grow and spread.
breast self exam

So — do I have dense breasts?

Touch them all you want.
It has nothing to do with size or how they feel. There is only one way to know your density. 


So how do I find out if I have dense breasts?

A radiologist uses a mammogram to determine your density level. So there is only 1 way to know:
or read a previous mammogram report.

Breast Density
Dense tissue looks white/cloudy
on a mammogram
while fat tissue looks dark.

Density is hereditary, but that doesn’t mean it’s constant. It can change!


Factors that can affect your density level throughout your life:


  • aging, having kids, and using Tamoxifen* can lower density
  • postmenopausal hormone replacement therapy and having a low body mass index are associated with higher density

There are 4 categories of Breast Density:

A, B, C or D

Any amount of dense tissue is NORMAL!

TYPE A:  Ideal Visibility

Your breasts are composed of almost entirely fatty tissue.
Technical Term: “Fatty”


TYPE B:  Generally Good Visibility

Your breasts are composed of mainly fatty tissue, with some scattered areas of dense tissue.
Technical Term: “Scattered Fibroglandular Density”


TYPE C: Limited Visibility

Your breasts are a mixture of fatty tissue and dense tissue.
Technical Term: “Heterogeneously Dense”

mostly cloudy

Type D:  Almost Zero Visibility

Your breasts are composed of almost entirely dense tissue.
Technical Term: “Extremely Dense”

totally cloudy
The more dense your breasts are, the more difficult to see through the tissue.
The more dense your breasts are, the more difficult to see through the tissue.
increased breast density

Know Your Risk

The more dense the breast,
the higher the risk for breast cancer.

A woman with extremely dense breasts (Category D) is 4-6 times more likely to get breast cancer than a woman with fatty replaced breasts (Category A).

Breast Density Risk

Why has no one told me about this?

Our healthcare system has inconsistent rules, and not all doctors are equally informed.


No one tells us

You have to find the screening that is right for your density — they are not created equal!

What are my options?