Question

Which of the following factors indicates the largest risk for breast cancer?

a) Early menopause

b) Late menarche

c) Family history of breast cancer

d) Regular exercise

Answer 1

The largest risk factor for breast cancer is a family history of the disease, due to possible inherited genetic mutations such as BRCA1 and BRCA2.

Step-by-step explanation:

The factor that indicates the largest risk for breast cancer is c) Family history of breast cancer. A family history suggests there may be inherited genetic mutations, such as BRCA1 and BRCA2, that greatly increase the risk. Certain patterns like diagnosis of cancer at an unusually young age, several close genetic relatives having breast cancer, or cancer occurring in both organs in a set of paired organs are indicative of a higher risk due to genetic factors. Although environmental factors also contribute to cancer risk, they can sometimes be modified, while genetic risk factors cannot be changed.

Answer 2

Family history of breast cancer indicates the largest risk for breast cancer. Therefore, the correct option is c) Family history of breast cancer.

Step-by-step explanation:

The largest risk factor for breast cancer among the options listed is a family history of breast cancer. Individuals with close relatives (like a mother, sister, or daughter) diagnosed with breast cancer have an increased risk. The presence of specific genetic mutations, like BRCA1 and BRCA2, inherited within families, significantly elevates the risk.

Family history indicates a genetic predisposition that contributes to a higher likelihood of developing breast cancer compared to other factors like early menopause, late menarche, or regular exercise. While these other factors might have some influence on breast cancer risk, a familial history of the disease poses a more substantial and direct risk due to inherited genetic mutations and shared environmental factors among relatives.

Screening and preventive measures are often recommended for individuals with a family history to detect and manage breast cancer risk early. Therefore, the correct option is c) Family history of breast cancer.