This one is for the boys


For the most part, breast cancer is a disease that affects women. However, a small proportion of new breast cancers are actually diagnosed in men.

In 2019, the American Cancer Society estimates that 2,670 breast cancers will be diagnosed in men in the United States and 500 men will die from breast cancer. To put that in perspective, male breast cancer accounts for less than 1 percent of all breast cancers and less than 0.5 percent of all male cancer deaths in the United States. For men, the lifetime risk of getting breast cancer is about 1 in 1,000.

So, why is it that breast cancer is so rare in men? The easiest explanation is that men have very little breast tissue compared to women. While both males and females are born with a small amount of breast tissue, during puberty, the breasts in women develop under the influence of estrogen and progesterone. This development of ductal and lobular tissue allows women to produce milk when pregnant.

Men lack mature breast tissue, making it much less likely for them to develop breast cancer. However, certain factors can put men at higher risk of breast cancer. These include men with Kleinfelter’s syndrome (men who are born with an extra “X” chromosome), BRCA2 mutation carriers, and men who take hormones. Excess body fat and alcoholism also are risk factors for breast cancer in both men and women, as they increase the amount of estrogen in the body.

Increased levels of estrogen in relation to testosterone can cause a benign swelling of breast tissue in males, called gynecomastia. Gynecomastia presents in males as breast enlargement and a rubbery palpable mass behind the nipple that may be tender. It is usually seen bilaterally, but may cause one breast to appear larger than the other. Gynecomastia can occur during infancy and puberty, and is very common in older men, due to fluctuations in hormone levels. Additionally, several medications, anabolic steroid use, and alcohol, heroin and marijuana use are associated with gynecomastia.

In a man presenting with a breast mass, it is important to differentiate benign gynecomastia from a cancerous tumor. A careful physical exam is helpful in determining if there is concern for cancer and, if there is any suspicion, a mammogram and biopsy can be performed for a definitive diagnosis.

Since men do not undergo routine screening mammograms, breast cancer in men usually presents at a more advanced stage than in women. Most men with breast cancer have symptoms of a firm breast mass located just behind the areola and may have associated nipple discharge, skin dimpling, or changes to the nipple areola complex. Treatment of breast cancer in men usually involves mastectomy to remove all of the breast tissue, followed by medication to block estrogen, and may involve chemotherapy and radiation therapy.

Finding breast cancer early improves the chances that it can be treated successfully. A lack of breast cancer awareness in men is a contributing factor to delays in seeking treatment. This has led to a higher mortality rate in men with breast cancer.

Some men may be under the impression that they cannot develop breast cancer and ignore a new lump in the breast, passing it off as an infection or a bruise. Others may be embarrassed and afraid to seek medical treatment, delaying diagnosis and decreasing the chance of successful treatment and cure.

If you or someone you know is a man with any symptoms concerning for breast cancer, be sure to be evaluated by a primary care physician so that the appropriate work up can be performed.

If there is a topic you would like to hear more about pertaining to women’s health or more specifically breast health, you can message me on Facebook @drstarrmautner.

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