A member asked:

My first cousin has confirmed lynch syndrome. mother, aunts, and on dad's side don't have it to my knowledge. chance of having it based off that?guess

3 doctors weighed in across 2 answers
Dr. Maulik Shah answered

Specializes in Clinical Genetics

Need more detail: Your chance is probably under 25% but difficult without more detail. When you discuss your relatives, on which side of the family are they? Your cousin could be a brand new mutation in the family which would mean you have very little risk. However, your cousin's parent could be a carrier which means that your parent has a 50% chance and you would have a 50% chance to inherit. Baysian risk

Answered 11/9/2015

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Dr. Gehrig Harris answered

Specializes in Family Medicine

Lynch syndrome: Earl, I'm sorry to hear about your cousin. That's not a diagnosis you want to get. Lynch syndrome is inherited in an autosomal dominant fashion which bodes well for you. I wish I had a little more of your geneology but from what you said your chances of having it are very low. If you don't know any direct relatives with it then your cousin probably got it from someone who married into the family.

Answered 11/3/2015

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