The most important risk factors for breast cancer are:
- Being a woman
Over 70 percent of women who develop the disease have only these two risk factors. The risk of breast cancer increases as a woman gets older. This is even more important after the age of 50. Most breast cancers are found in women 55 and older.
Other factors are known to increase the risk of breast cancer. These fall under two major categories:
- Those that cause moderately higher risk
- Those that cause a slightly higher risk
Not all of the risk factors have the same level of risk. Having one or more doesn’t guarantee that the disease will occur.