Most breast cancer guidance starts at 40, so younger women hear very little. Diagnoses under 40 are uncommon, but they are more often genetic and more often aggressive, and they are easier to miss because nobody is looking. Five things to know.
This article is general health information, not medical advice. Talk to a healthcare professional about your own situation.
1. Know your breasts
A lump is not the only sign. Nipple discharge, a nipple that pulls inward, skin dimpling or a change in size or shape all count. Check monthly at the same point in your cycle so you know your normal.
2. Know your family history
In younger women, breast cancer is more likely to be inherited. If you have relatives diagnosed young, or with ovarian or prostate cancer, ask about genetic counseling. BRCA1 and BRCA2 are the best-known genes; there are others, and a blood test finds them. Start with the family conversation.
3. Know the other risk factors
- Chest radiation earlier in life.
- Periods starting before 12.
- No pregnancy, or a first pregnancy after 30.
- Dense breast tissue.
- Heavy alcohol use, obesity and a sedentary lifestyle.
4. Know how to find the right team
If you are diagnosed, you may see medical, surgical and radiation oncologists. Ask whether the team works with young patients and is current on genetics, chemotherapy before surgery and immunotherapy, which has shown particular promise in triple-negative breast cancer, a type more common in younger women.
5. Know it is fine to ask everything
Fertility, contraception, pregnancy after treatment, early menopause and body image are all fair questions, and they matter more under 40. Write them down and bring them.
Frequently asked questions
Should women under 40 get mammograms?
Not routinely at average risk. With a strong family history or known mutation, screening may start at 30 or earlier, often with MRI. Ask your doctor.
Is a lump under 40 usually cancer?
Usually not; cysts and fibroadenomas are far more common. Get any new lump checked anyway.