Some conditions are genetic and can run in families, e.g. diabetes or certain cancers. If the insurer deems you a high risk for the condition they may request a medical screening or they may add on exclusions or raise the monthly premium.
It’s very important that you are sure about the family member, the exact name of the condition and when they were diagnosed, otherwise you may have an incorrect outcome to your application.
As with any insurance policy, if you do not disclose all information required, you may not receive a payout.