Do my daughters need testing for the risk of Lynch syndrome?

Question

Hello doctor,

I am 42 years old and was diagnosed with endometrial cancer at an unusually young age. My oncologist referred me for genetic testing, which confirmed that I have Lynch syndrome, a genetic condition that greatly increases the risk of several cancers, including endometrial cancer and colorectal cancer.

I have two daughters aged 16 and 19, and I am consumed with guilt and fear knowing that I may have passed this genetic mutation on to them. I want to know

At what age should my daughters be tested?
What kind of surveillance would they have to live with for the rest of their lives if they test positive?
Whether there is anything they can do now to meaningfully reduce their risk of developing the same cancers that I am currently fighting.

Kindly advise.

Answer 1

Hello,

Welcome to icliniq.com

It is completely understandable to feel fear and anxiety after being diagnosed with endometrial cancer, especially after learning that Lynch syndrome is present. Concern for children in this situation is very natural.

Lynch syndrome is a hereditary condition that can be passed down through families. This is caused by changes (mutations) in genes that usually repair mistakes in the DNA of your body. This condition increases the risk of cancers such as colorectal cancer, endometrial cancer, ovarian cancer, and certain gastrointestinal cancers.

If these genes are not functioning properly, a person’s risk of developing some types of cancer may increase with age. Genetic counseling and testing are usually offered at ages 18 to 20. One daughter is 19. You may want to consider a consult with a genetic counselor soon to discuss testing and implications.

Testing your daughter before she reaches adulthood is usually not recommended unless there is a medical reason to start screening early. If she is found to have Lynch syndrome, her doctor may recommend regular check-ups and preventive screening to help detect any health changes as early as possible. This long-term surveillance may include:

Regular colonoscopy, usually starting between the ages of 20 and 25, and repeated every one to two years to detect early colorectal changes.
Pelvic examination and transvaginal ultrasound to monitor the uterus and ovaries.
Periodic imaging, such as magnetic resonance imaging (MRI) of the abdomen or pelvis, is indicated.
Regular consultations with specialists for ongoing risk assessment.

There are also preventive strategies that may help reduce cancer risk:

Maintaining a healthy body weight, exercising regularly, eating a balanced diet with plenty of fruits and vegetables, and not using tobacco can all help you stay healthy.
In some individuals with lynch syndrome, doctors may consider preventive medications such as Aspirin under medical supervision, as research suggests it may reduce the risk of colorectal cancer in certain high-risk groups.
Preventive surgeries may also be discussed later in adulthood, depending on risk level and family planning considerations.

It is important to remember that lynch syndrome follows an autosomal dominant inheritance pattern; each child has an approximately 50 percent chance of inheriting the mutation. However, it is also possible that the mutation was not passed on to either child.

While this situation may be overwhelming, early detection and vigilant monitoring for many with lynch syndrome can lead to early and treatable cancers. A genetic counselor and oncology team can help to develop a personalized plan for both daughters.

I would recommend genetic testing for the Lynch syndrome mutation after appropriate genetic counseling.

I would suggest the following treatment plan:

Surgery, such as a hysterectomy, is recommended by the oncology team.
Brachytherapy (internal radiation therapy), when indicated.

I hope my answer is satisfactory to you.

Feel free to consult me at iCliniq for any further queries.

Thank you.