How common is breast cancer at 49?
James Craig
Published Feb 21, 2026
Your risk for breast cancer increases as you age. About 80% of women diagnosed with breast cancer each year are ages 45 or older, and about 43% are ages 65 or above. Consider this: In women ages 40 to 50, there is a one in 68 risk of developing breast cancer. From ages 50 to 60, that risk increases to one in 42.
How long does the average woman live with metastatic breast cancer?
While treatable, metastatic breast cancer (MBC) cannot be cured. The five-year survival rate for stage 4 breast cancer is 22 percent; median survival is three years. Annually, the disease takes 40,000 lives.
What age is metastatic breast cancer most common?
The number of cases of metastatic breast cancer diagnosed in women ages 25 to 39 went up by 2.1% per year from 1976 to 2009. Women of all races and ethnicities were affected and the increases happened in urban, suburban, and rural areas. The greatest increase was in women ages 25 to 34.
At what age is breast cancer most aggressive?
More than 13,000 women ages 40 or under will be diagnosed this year. When breast cancer is diagnosed at a young age, it’s more likely to be aggressive and to spread quickly. Young women may not get a diagnosis right away because many organizations don’t recommend regular mammogram screenings until age 45 or 50.
What is the life expectancy of HER2 positive metastatic breast cancer?
Table 2.
| Characteristic | 1-Year Overall Survival | 2-Year Overall Survival |
|---|---|---|
| % | 95% CI | |
| HER2 negative/HR negative | 56.00 | 23.4 to 31.8 |
| Age at metastases, years | ||
| < 50 | 76.50 | 51.6 to 58.8 |
What causes death in metastatic breast cancer?
The major causes of death included pulmonary insufficiency (26%), infection (24%), cardiac disease (15%), hepatic insufficiency (14%), hemorrhage (9%), central nervous system disease (9%), and hypercalcemia (3%).