Cascade testing refers to testing “at-risk” family members for a gene mutation, once the mutation has been found in a family member.
For Lynch syndrome, once family members get cascade testing, they can also benefit from screening, cancer prevention, and early detection strategies.
So if a family member has Lynch syndrome
You can ask your GP to refer you to a cancer genetics service.
Family members who can get a test include:
- parents
- brothers or sisters
- children age 18 and over
Ask your relative for a copy of their Lynch syndrome test result or a letter you can bring to your GP appointment – if they have one.
If you get a Lynch syndrome diagnosis, your relatives can ask their GP to refer them to a cancer genetics service. This is known as cascade testing. It is also known as predictive testing.
Lynch syndrome test results can help your healthcare team:
- understand your and your family’s risk of developing cancer in the future
- make a plan to help reduce your risk of cancer
Lynch Syndrome Ireland 