Breast Density & 3D Mammography for Women Over 40
Breast Density and 3D Mammography: What 40-Year-Olds Need to Know
About half of women over 40 have dense breasts. Your first mammogram at age 40 does more than check for breast cancer. It establishes what’s normal for your breasts and whether you have dense breast tissue. That finding alone can change your entire screening approach.
Breast density changes over a woman’s lifetime and is not something you can feel – it can only be identified through a mammogram.
What Are Dense Breasts, and How Are They Categorized?
Dense breasts have more glandular and connective tissue than fatty tissue. Breast density is divided into four categories (A, B, C and D) that range from almost entirely fatty to extremely dense. Categories C and D are considered dense.
• Category A – Almost entirely fatty (not dense)
• Category B – Scattered areas of fibrous and glandular tissue (not dense)
• Category C – Heterogeneously dense (dense)
• Category D – Extremely dense (dense)
Why Does Breast Density Matter?
Breast density matters for two important reasons. First, dense tissue is associated with a moderately higher lifetime risk of developing breast cancer. Second, dense tissue can mask tumors on a mammogram. As Dr. Emily Sedgwick, Chief Medical Officer at Solis Mammography, explains: "Dense tissue shows up as white spots on a mammogram, which can be challenging because cancer also appears as little white spots."
That overlap can make early detection harder, unless you have the right technology.
How 3D Mammography Works for Dense Breasts
Outdated 2D mammography captures flat images of the breast. Solis Mammography use 3D mammography, integrated with AI software to provide the most accurate breast cancer screening currently available. 3D mammography provides multiple images of breast tissue in slices, allowing radiologists to see through breast tissue layers and identify small, early-stage cancers that may be hidden in dense breast tissue.
What the FDA Now Requires About Breast Density Reporting
As of September 10, 2024, the U.S. Food and Drug Administration (FDA) require all mammography providers nationwide to include breast density information in every patient report. Every woman who gets a mammogram must now be told whether her breast tissue is "dense" or "not dense."
This federal requirement ensures that no woman leaves a screening unaware of a factor that could influence her cancer risk and screening plan.
If you receive a dense breast notification, talk to your doctor about whether supplemental screening, such as a breast ultrasound, may be appropriate for you.
Take Your Breast Health Into Your Own Hands
Annual 3D mammograms are the most effective way to monitor your breast health, track any changes over time, and catch cancer at its earliest stage.