When people have an external locus of control and believe they have a genetic predisposition to cancer then they will sabotage their efforts to take appropriate action.
Although the risk is increased, having a genetic predisposition to cancer does not guarantee that you will develop the disease. This is because the gene does not directly cause cancer. Mutations in tumour suppressor genes are frequently to blame for a hereditary susceptibility.
Breast cancer, endometrial cancer, ovarian cancer, colorectal cancer, and other cancers may have a genetic predisposition. According to the MD Anderson Cancer Center, "About 5–10% of all malignancies are hereditary, providing a comprehensive review of a genetic susceptibility for cancer and how it may affect diagnosis.
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