Are there different categories of dense tissue?

Are there different categories of dense tissue?

Breast density is divided into four categories, ranging from having very little dense tissue to extremely dense tissue. The four categories are:

• Type 1: Majority fatty tissue
• Type 2: Some scattered dense tissue
• Type 3: More dense tissue than fatty tissue
• Type 4: Extremely dense tissue with very little fatty tissue

Most women are either type 2 or 3. This means they have some combination of dense and fatty tissue.