Yes, some cancers can be genetic. While most cancers are caused by environmental factors, lifestyle choices, or random mutations, about 5% to 10% of cancers are inherited. This means a person may have a higher risk of developing certain cancers due to genetic mutations passed down from parents.
What Is Hereditary Cancer?
Hereditary cancer occurs when a person inherits a faulty gene (mutation) that increases their risk of developing cancer. These mutations do not cause cancer directly but make cancer more likely if other factors are present.
Common Types of Genetic Cancers
- Ovarian cancer
- Prostate cancer
- Colorectal cancer (e.g., Lynch syndrome, familial adenomatous polyposis)
- Pancreatic cancer
- Melanoma
- Kidney cancer (in some inherited syndromes)
Signs Cancer May Be Genetic
- Multiple family members with the same or related types of cancer
- Cancer at a young age (e.g., breast cancer before 40)
- Multiple cancers in one individual
- Rare cancers (e.g., male breast cancer)
- Known inherited syndromes in the family
Genetic Testing and Counseling
- Genetic testing can identify mutations in specific cancer-related genes (like BRCA1/2, MLH1, APC, etc.)
- Genetic counseling helps individuals understand their risk and the pros and cons of testing
- Testing is usually recommended for those with a strong family history or early-onset cancers
What If You Have a Genetic Risk?
- Increased screenings (e.g., earlier and more frequent mammograms or colonoscopies)
- Preventive measures (e.g., surgery, medications)
- Healthy lifestyle to reduce additional risk factors
- Informing family members about potential genetic risks