How do I tell my family about cascade testing, and what if they do not want to k

[Anonymous]

How do I tell my family about cascade testing, and what if they do not want to know?

[Genetic Counselor]

Telling relatives is often the hardest part. Research shows that many at-risk relatives are never tested. A 2022 review combining many studies of hereditary cancer families found that when patients were left to inform relatives on their own, only about 36 in every 100 relatives went on to have testing. When the medical team contacted relatives directly, with the patient’s permission, this rose to about 58 in every 100. Similar gaps have been seen for inherited heart conditions.

In India, family and social concerns add further barriers. A 2025 study of families with transfusion-dependent thalassemia found that only about 16 in every 100 eligible extended relatives had been screened, even though more than a third of those screened turned out to be carriers. Fear of stigma, particularly around marriage prospects, was the main reason families hesitated to share.

Some practical steps that help:
• Use a family letter Many genetics clinics provide a written letter explaining the condition, the gene change, and how to get tested. Studies show written information aids improve testing rates. Relatives can take it straight to their own doctor.
• Share the actual report Give relatives a copy of your genetic test report, or the gene name and exact change. This makes their testing faster, cheaper, and more accurate.
• Start with those at highest risk Begin with brothers, sisters, parents, and adult children. They can then share with their own families.
• Ask your clinic for help Some genetics services can contact relatives directly, with your consent, or offer a joint counseling session for the family.

Some relatives may choose not to be tested, and that is their right. The goal is to make sure they have the information, not to pressure a decision. Remember that a negative result can bring real relief to many relatives. Genetic counseling services in India are increasingly available through hospital genetics departments and accredited laboratories, and many offer counseling for relatives remotely.

[Author]

Posts