Have you ever had a mammogram and seen the term "dense breasts" on the report? When you saw that, you probably felt a little scared and curious, "What is that?" In fact, like many things in our bodies, knowing what breast density is is very important for your breast health. Today, we'll talk about this in a very simple way that you can understand.
What is breast density?
Simply put, a breast is made up of three main parts.
1. Glandular tissue
2. Ducts ( DUC ts)
3. Fatty tissue and Fibrous/Connective tissue
Breast density refers to the amount of glandular and connective tissue in relation to the amount of fatty tissue. Breasts with less fatty tissue and more glandular and connective tissue are what we call "dense breasts."
The important thing is that this cannot be determined by the size or feel of the breasts. A person's breasts can be small but dense, or large but less dense. This can only be determined with a mammogram .
This density usually decreases with age. While about 75% of women under 50 have dense breasts, only a third of women over 50 have dense breasts. But this varies greatly from person to person.
How does having dense breasts affect cancer risk?
This is the most important point. Having dense breasts affects you in two main ways.
1. Slightly increased risk of cancer: Women with dense breasts have a slightly higher risk of developing breast cancer than those with less dense breasts.
2. Hiding cancer cells on a mammogram: This is the biggest challenge. On a mammogram X-ray, fatty tissue appears black. But dense tissue (glandular, connective tissue) and cancer cells often appear white. Think about it, it's easy to find a white pebble on a black road. But how hard is it to find a white pebble on a snowy field? Similarly, cancer cells (which are still white) against the white background of dense breasts may be missed by a mammogram.
For both of these reasons, it's important to be aware of your breast density so that you can discuss it with your doctor and decide what additional tests you need to do, if necessary.
Supplemental Screening for Breast Density
If you have dense breasts and your risk of cancer is average or moderate, you may want to consider other tests in addition to mammograms. Remember that these decisions should always be made in consultation with your doctor .
| Test method | A simple explanation |
|---|---|
| 3D Mammogram / Tomosynthesis | An advanced version of a regular mammogram. It takes pictures of the breast in thin slices, making it easier to detect things hidden among dense tissue. |
| Ultrasound Scan | It uses sound waves to examine breast tissue. It can help detect things like lumps that a mammogram can't detect. |
| MRI Scan | A very sensitive test. Usually recommended for women at high risk of cancer. |
| Other Newer Techniques | There are also modern technologies such as Molecular Breast Imaging and Contrast-enhanced Mammogram, but they are not yet widely used. |
Frequently Asked Questions and Answers (Q&A)
Let's answer a few questions you may have when discussing this topic.
1. Can food and drink reduce breast size?
In fact, diet cannot directly change breast density. Perhaps if your body weight increases or decreases, the amount of fatty tissue in the breasts may change. While this may have some effect on density, it is not something we can control.
2. Can genetic risk be skipped (skip) a generation?
No. Genes that increase breast cancer risk (e.g., BRCA gene mutations) are passed down directly from generation to generation. For example, if your grandmother had a BRCA gene mutation, but your mother didn't inherit it, you won't inherit it either (unless it's from your father's side). So the concept of "skipping" doesn't apply here.
3. Does hormone therapy increase thickness?
Yes. Some hormone treatments, especially those taken after menopause, can cause breast density to increase. If you are taking such treatments, talk to your doctor about it.
4. Is artificial intelligence (AI) used in breast exams?
This is a hot topic in the world right now. AI is already helping to analyze things like X-rays in medicine. But it's not a machine that will give you your mammogram report. Currently, AI is used as an additional help to the radiologist, like a second opinion. In the future, AI may be used to further confirm the radiologist's conclusion. So there's nothing to be afraid of.
5. If MRI is better than mammogram, why are mammograms still done?
Good question. There are several reasons.
- Data: Decades of research have shown that mammograms can reduce breast cancer deaths and complications. This means that cancer can be detected early, which increases the chance of treatment and cure. There is no such long-term, robust data on MRI.
- Not detecting all cancers: MRI does not detect all cancers that can be detected by a mammogram. Some types of cancer are only detected by a mammogram.
Therefore, the current standard in the world is to use the mammogram as the primary screening test.
Take-Home Message
- Breast density is an important piece of information related to your breast health.
- This thickness is determined by a mammogram, not by the size or feel of the breasts.
- Having dense breasts slightly increases the risk of cancer and can hide cancer on a mammogram.
- If the report says you have dense breasts, don't panic and talk to your doctor .
- If necessary, discuss with your doctor about seeking additional testing, such as an ultrasound or MRI, and make the best decision.
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