The incidence of breast cancer increases with age

Estrogen in women before and after menopause is a prominent cause of breast cancer. Genetic factors, dietary factors, and external physical and chemical factors are all causes of breast cancer. What are the common causes of breast cancer? The following is an introduction to the causes of breast cancer.

What are the main causes of breast cancer ? The specific causes of breast cancer are as follows:

1. Age: In women, the incidence of breast cancer increases with age. It is rare before menarche and before the age of 20, but it rises rapidly after the age of 20. It is higher at 45 to 50 years old, but is relatively flat. The incidence continues to rise after menopause and reaches its peak at around 70 years old. The mortality rate also increases with age. After the age of 25, the mortality rate gradually increases until old age. The cause of breast cancer will always maintain an upward trend.

2. Genetic factors: Women in the family with a history of breast cancer in the first-degree direct family are 2 to 3 times more likely to develop breast cancer than the general population.

3. Age of menarche: Those whose menarche age is earlier than 13 years old are 2.2 times more likely to develop breast cancer than those who are older than 17 years old. This is one of the causes of breast cancer.

4. Menopausal age: Those who reach menopause at an age of over 55 are more likely to be at higher risk than those who are under 45. This is also a cause of breast cancer that cannot be ignored.

Experts say these are the common causes of breast cancer. The above is a detailed introduction to the causes of breast cancer. I hope you will understand the causes of breast cancer. If you still have questions about the causes of breast cancer, please consult our online experts.