Lynch syndrome, a genetic disorder linked to a higher risk of numerous cancers including colorectal cancer, is more common than many people realize but remains largely unrecognized. Lynch syndrome impacts roughly 1 in 300 Americans, making it more common than the BRCA mutation, which affects about 1 in 400 people. Despite its prevalence, more than 1 million Americans living with Lynch syndrome don’t know they have it because they haven’t had genetic testing for it.
Genetics and Inheritance Pattern
There are five different genes that can cause Lynch syndrome, with people affected by the genetic defect born with it. “It’s not a syndrome that skips generations, so it goes from grandparent to parent to child, but it only has about a 50% chance of affecting each member of a subsequent generation,” according to medical experts. For example, if a father with Lynch syndrome has a daughter, that daughter has a 50% risk of also having Lynch syndrome.
Why Lynch Syndrome Remains Unknown
Lynch syndrome is less well-publicized than BRCA, partly due to the lack of celebrity or pop culture association. Unlike the BRCA space, which received significant attention after Angelina Jolie’s public disclosure of her experience, Lynch syndrome has not benefited from similar visibility. Additionally, the main cancer associated with Lynch syndrome is colorectal cancer, which tends to be a cancer people don’t want to discuss in their families, further hampering awareness of the genetic condition.
Testing and Prevention
Certain people should talk to their doctor about genetic testing for Lynch syndrome, including those with a personal or family history of colorectal cancer or other associated cancers. If a family member—such as a grandparent, parent, uncle, or cousin—developed one of these cancers before age 50, that should trigger a conversation with a doctor. Genetic testing is a clinical test often covered by insurance with appropriate family histories and can be done via a blood or saliva sample. Knowing you have Lynch syndrome can enable earlier cancer screenings and additional testing procedures. As one expert noted, “This is not a death sentence. There are programs that are designed to help patients that are known to have this disorder get screened appropriately with a more intensive screening program to try to provide them with a totally normal lifespan.”
This article is an AI-assisted summary. All facts and figures are drawn from the original report: https://us.headtopics.com/news/this-common-genetic-cancer-risk-could-run-in-your-family-81387133