Quick read
Key points
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Lynch syndrome is an inherited genetic condition that significantly increases the risk of certain cancers, particularly bowel and womb (endometrial) cancer, and to a lesser extent some other cancers. It's caused by changes in specific genes that normally help repair DNA errors, and is passed down through families.
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Topic-specific prevention and risk reduction will be added during the article-specific evidence audit.
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You have a strong family history of bowel or womb cancer, particularly at younger ages
01 · Know
What is Lynch Syndrome?
Lynch syndrome is an inherited genetic condition that significantly increases the risk of certain cancers, particularly bowel and womb (endometrial) cancer, and to a lesser extent some other cancers. It's caused by changes in specific genes that normally help repair DNA errors, and is passed down through families.
People diagnosed with Lynch syndrome are usually offered more frequent, earlier cancer screening than the general population, since regular monitoring allows any cancers that do develop to be caught and treated at an earlier, more treatable stage.
02 · Understand
Clinical context
Genetic testing can identify Lynch syndrome in family members
Once Lynch syndrome is identified in one family member, genetic testing can determine whether other relatives have inherited the same gene change, allowing them to access appropriate screening even before any cancer develops.
03 · Act
When to Seek Genetic Counselling
- 1You have a strong family history of bowel or womb cancer, particularly at younger ages
- 2A family member has been diagnosed with Lynch syndrome
- 3You've been diagnosed with bowel or womb cancer at a young age
- 4You've tested positive for Lynch syndrome and want to discuss your screening plan
04 · Prevent & manage
Practical steps
Regular Screening Is Central to Managing Lynch Syndrome
For people with Lynch syndrome, attending recommended screening — often more frequent colonoscopies and other checks than the general population — is the most important step for catching any cancers early.
- 1Attend genetic counselling if you have a relevant family history.This helps determine whether genetic testing for Lynch syndrome is appropriate for you.
- 2Follow your personalised screening schedule closely.This is usually more frequent than standard population screening and tailored to your specific risk.
- 3Inform family members if you're diagnosed.This allows them to consider genetic testing and appropriate screening for themselves.
- 4Discuss any additional risk-reduction options with your specialist team.This may include specific lifestyle advice or, for some people, additional preventive options.
Evidence
References
BarnMD Health Intelligence uses authoritative and clinically relevant sources appropriate to the topic. References are shown so readers can inspect the evidence directly.
- HSE: Lynch syndrome ↗
Medical information notice
Health education, not individual medical advice
BarnMD Health Library provides general health education for public health literacy. Reading this article does not establish a doctor-patient relationship and this information is not a diagnosis, prescription, or personalised treatment plan. If you have symptoms or concerns about your health, seek appropriate advice from a qualified healthcare professional. If you develop emergency warning signs, seek urgent or emergency medical attention.
BarnMD Bottom Line
Lynch syndrome significantly increases cancer risk, but regular, tailored screening allows early detection and treatment, significantly improving outcomes.
Family members of someone diagnosed with Lynch syndrome should consider genetic counselling to determine their own risk.