How Genetics Can Influence Prostate Cancer Risk

When it comes to prostate cancer, genetics can play an important role.

Some men develop prostate cancer without having a known family history or inherited genetic risk. Others may have a significantly higher risk because of genes passed down through their family.

Understanding this distinction can help men make more informed decisions about prostate health and screening.

Genetics does not determine with certainty whether someone will develop prostate cancer.

Instead, certain inherited genetic changes can increase the likelihood of developing the disease.

Family history can also provide clues about inherited risk, even when a specific genetic mutation has never been identified.

For men with a strong family history of prostate cancer or certain other cancers, talking with a healthcare professional about genetic risk may be particularly important.

What Does Genetics Have to Do With Prostate Cancer?

Every person inherits genetic material from their parents.

Genes provide instructions that influence how cells grow, divide, repair themselves, and respond to damage.

Certain genetic changes can interfere with the body's normal ability to control cell growth.

When these changes affect genes involved in DNA repair or other important cellular processes, they may increase the risk of cancer.

Some genetic changes develop during a person's lifetime.

Others are inherited, meaning they are present from birth and can potentially be passed from one generation to the next.

Inherited genetic changes are especially important when discussing hereditary cancer risk.

Family History Is an Important Clue

One of the simplest ways to identify potential inherited prostate cancer risk is to look at family history.

A man may have an increased risk if a close relative has had prostate cancer.

This is particularly important when:

  • A father or brother had prostate cancer

  • Multiple relatives have had prostate cancer

  • A relative was diagnosed at a younger age

  • Several family members have had related cancers

  • There is a known inherited cancer-related gene change in the family

A family history does not necessarily mean that a specific genetic mutation is present.

However, it can signal that a man may benefit from a more detailed discussion about his risk.

Prostate Cancer Can Run in Families

Researchers have found that prostate cancer can sometimes cluster within families.

Having a first-degree relative, such as a father or brother, with prostate cancer can increase a man's risk compared with someone without that family history.

The risk can be higher when multiple close relatives are affected or when relatives were diagnosed at younger ages.

This is one reason doctors often ask about family cancer history when discussing prostate cancer screening.

If you are unsure about your family's medical history, consider talking with relatives and learning whether prostate cancer or other cancers have occurred in your family.

BRCA Genes and Prostate Cancer Risk

The BRCA1 and BRCA2 genes are best known for their connection to breast and ovarian cancer, but changes in these genes can also affect prostate cancer risk.

In particular, inherited changes in BRCA2 are associated with an increased risk of prostate cancer.

Some prostate cancers associated with inherited BRCA2 changes may also behave more aggressively.

This is why knowing whether certain hereditary cancer risk factors are present can be clinically important.

A doctor may consider genetic counseling or genetic testing for men with a strong family history or other features suggesting inherited cancer risk.

Other Genes Associated With Prostate Cancer

BRCA1 and BRCA2 are not the only genes associated with prostate cancer risk.

Other genes involved in DNA repair and hereditary cancer syndromes can also be relevant.

These may include genes such as:

  • ATM

  • CHEK2

  • PALB2

  • HOXB13

  • MSH2

  • MSH6

  • MLH1

  • PMS2

The significance of a genetic finding can vary depending on the specific gene and genetic variant.

Some inherited variants have a well-established association with prostate cancer, while others may have less certain clinical significance.

This is one reason genetic testing results should be interpreted by qualified healthcare professionals rather than viewed in isolation.

HOXB13 and Hereditary Prostate Cancer Risk

HOXB13 is another gene that has been associated with hereditary prostate cancer risk.

Certain inherited changes in HOXB13 can increase the likelihood of developing prostate cancer.

HOXB13 is particularly interesting because it has a more specific connection to prostate cancer than some genes associated with broader hereditary cancer syndromes.

Men with a strong family history of prostate cancer may discuss whether genetic counseling or testing is appropriate.

Does Having a Genetic Mutation Mean You Will Get Prostate Cancer?

No.

This is an important distinction.

An inherited genetic change that increases prostate cancer risk does not guarantee that a man will develop the disease.

It means his risk may be higher than that of someone without the genetic change.

Cancer development usually involves multiple factors.

Genetics may be one part of the equation, while age, environmental factors, lifestyle, and other biological processes can also contribute.

Therefore, a genetic risk factor should be viewed as information that can help guide risk assessment, not as a prediction of an individual's future with certainty.

Why Age Still Matters

Even when genetics increase prostate cancer risk, age remains an important factor.

Prostate cancer becomes more common as men get older.

This means genetic risk and age should be considered together.

For example, a younger man with a strong family history may want to discuss prostate cancer screening earlier than someone with average risk.

A healthcare professional can help determine when screening conversations should begin based on the individual's complete risk profile.

When Should Men Consider Genetic Testing?

Genetic testing is not necessary for every man.

However, testing may be considered in certain circumstances, including a strong family history of prostate cancer or other cancers associated with hereditary cancer syndromes.

A doctor or genetic counselor may consider factors such as:

  • Multiple relatives with prostate cancer

  • Prostate cancer diagnosed at a young age in the family

  • Metastatic or high-risk prostate cancer

  • Breast cancer in male or female relatives

  • Ovarian cancer

  • Pancreatic cancer

  • Certain colorectal or endometrial cancers

  • A known hereditary cancer mutation in the family

The exact criteria for testing can vary based on the individual's personal and family history.

What Is Genetic Counseling?

Genetic counseling can help a person understand what genetic testing may, and may not, tell them.

A genetic counselor may review:

  • Personal medical history

  • Family cancer history

  • Patterns of cancer within the family

  • Potential hereditary syndromes

  • Benefits and limitations of testing

  • Possible implications of test results

This can be particularly useful because genetic testing can produce different types of results.

A test may identify a pathogenic variant, produce a negative result, or identify a genetic change whose significance is uncertain.

Understanding what the result actually means is just as important as receiving the result.

What If Genetic Testing Finds an Increased Risk?

Finding an inherited genetic risk factor does not mean there is nothing that can be done.

Instead, the information may help guide conversations about:

  • Earlier or more individualized screening

  • PSA testing

  • Urologic evaluation

  • Genetic counseling

  • Family members who may benefit from testing

  • Monitoring strategies

The appropriate approach depends on the specific genetic finding and the individual's overall risk.

A genetic result should therefore become part of a broader prostate health plan.

Genetic Information Can Also Matter to Family Members

One important feature of inherited genetic changes is that they can potentially be passed from one generation to the next.

If a man is found to have a pathogenic inherited variant associated with cancer risk, certain relatives may also have an increased chance of carrying the same variant.

This can make genetic information relevant beyond the individual being tested.

A genetic counselor can explain whether relatives may benefit from testing and how results could affect their own healthcare decisions.

What Men Should Ask Their Doctor

If prostate cancer runs in your family, consider asking:

  • Does my family history increase my prostate cancer risk?

  • Should I begin screening earlier than average-risk men?

  • Would genetic counseling be appropriate for me?

  • Should I consider genetic testing?

  • Are there specific genes that are relevant to my family history?

  • Would my genetic risk affect how often I should have my PSA checked?

  • Should my family members consider genetic testing?

These questions can help turn family history into actionable information.

Genetics and PSA Testing

Genetic risk does not replace PSA testing.

Instead, genetics can help provide additional context for deciding when and how prostate cancer screening should be approached.

For example, a man with a significant inherited risk factor may have a different screening discussion than a man with average risk.

PSA itself does not tell doctors whether a genetic mutation is present.

Likewise, genetic testing does not replace PSA or other prostate evaluations.

They provide different types of information.

Can Lifestyle Overcome Genetic Risk?

Healthy lifestyle choices are important for overall health, but they cannot completely eliminate an inherited genetic risk.

A man with a genetic predisposition should not assume that healthy eating, exercise, or maintaining a healthy weight makes prostate cancer screening unnecessary.

At the same time, having an inherited risk factor does not mean lifestyle choices are irrelevant.

Maintaining good overall health can support general well-being and may contribute to better health outcomes.

The key is to think of genetics as one part of the overall risk picture.

Frequently Asked Questions

Does prostate cancer run in families?

Yes. Men with a close relative who has had prostate cancer can have a higher risk, particularly when multiple relatives are affected or diagnoses occurred at younger ages.

What genes increase prostate cancer risk?

Several inherited genes have been associated with prostate cancer risk, including BRCA1, BRCA2, ATM, CHEK2, PALB2, HOXB13, and certain genes involved in DNA mismatch repair.

Does BRCA2 increase prostate cancer risk?

Yes. Inherited BRCA2 changes are associated with an increased risk of prostate cancer and may also be associated with more aggressive disease.

Does having a prostate cancer gene mean I will get cancer?

No. An inherited genetic change can increase risk but does not guarantee that prostate cancer will develop.

Should men with a family history get genetic testing?

Not necessarily everyone, but men with certain family-history patterns or personal cancer characteristics may benefit from discussing genetic counseling or testing with a healthcare professional.

Can genetics affect when I should start PSA screening?

Yes. Men with elevated hereditary risk may be advised to discuss prostate cancer screening earlier or more proactively than men at average risk.

The Bottom Line

Genetics can influence a man's risk of developing prostate cancer, but genetics do not determine his future with certainty.

A family history of prostate cancer can be an important warning sign, particularly when multiple close relatives are affected or diagnoses occurred at younger ages.

Inherited changes in genes such as BRCA2 and HOXB13, along with several other genes involved in DNA repair and cancer development, can also increase prostate cancer risk.

For men with a significant family history or other risk factors, talking with a healthcare professional about genetic counseling and potential genetic testing may provide valuable information.

The most important step is knowing your family history.

If prostate cancer or other related cancers occur in your family, tell your doctor.

Understanding your genetic and family history can help you make more informed decisions about when to begin prostate cancer screening and how closely your prostate health should be monitored.


Related Articles 

Questions men with a family history of prostate cancer should ask

References

Pritchard, C. C., Mateo, J., Walsh, M. F., De Sarkar, N., Abida, W., Beltran, H., Garofalo, A., Gulati, R., et al. (2016). Inherited DNA-repair gene mutations in men with metastatic prostate cancer. New England Journal of Medicine, 375(5), 443–453.

Ewing, C. M., Ray, A. M., Lange, E. M., Zuhlke, K. A., Robbins, C. M., Tembe, W. D., Wiley, K. E., Isaacs, S. D., et al. (2012). Germline mutations in HOXB13 and prostate-cancer risk. New England Journal of Medicine, 366(2), 141–149.

Nyberg, T., Tischkowitz, M., Antoniou, A. C. (2020). BRCA1 and BRCA2 mutation carriers and prostate cancer risk: A systematic review and meta-analysis. Journal of the National Cancer Institute, 112(4), 320–330.

American Cancer Society. (2024). Prostate cancer risk factors. American Cancer Society.

National Comprehensive Cancer Network. (2024). NCCN clinical practice guidelines in oncology: Prostate cancer early detection. National Comprehensive Cancer Network.