Even though men don't have breasts like women, they do have a small amount of breast tissue. The "breasts" of an adult man are similar to the breasts of a girl before puberty. In girls, this tissue grows and develops, but in men, it doesn't.
But because it is still breast tissue, men can get breast cancer. Men get the same types of breast cancers that women do, but cancers involving the parts that make and store milk are rare.
Doctors used to think that breast cancer in men was more severe than it was in women, but it now seems that it's about the same.
Which Men Are More Likely to Get Breast Cancer?
Other things that raise the odds for male breast cancer include:
- Breast cancer in a close female relative
- History of radiation exposure of the chest
- Enlargement of breasts (called gynecomastia) from drug or hormone treatments, or even some infections and poisons
- Taking estrogen
- A rare genetic condition called Klinefelter's syndrome
- Severe liver disease, called cirrhosis
- Diseases of the testicles such as mumps orchitis, a testicular injury, or an undescended testicle
Symptoms of breast cancer in men are similar to those in women. Most male breast cancers are diagnosed when a man discovers a lump on his chest.
But unlike women, men tend to delay going to the doctor until they have more severe symptoms, like bleeding from the nipple. At that point, the cancer may have already spread.
Diagnosis and Treatment
Likewise, the same treatments that are used in treating breast cancer in women -- surgery, radiation, chemotherapy, targeted therapy, hormone therapy, and immunotherapy -- are also used to treat breast cancer in men. The one major difference is that men with breast cancer respond much better to hormone therapy than women do. About 90% of male breast cancers have hormone receptors, meaning that hormone therapy can work in most men to treat the cancer.