Is there a blood test or DNA test available to diagnose HHT?
Yes, but it is expensive, more complex than most genetic testing and generally only helpful after HHT has first been confirmed in a family based on symptoms. In order to decide whether genetic testing will be helpful in your family, and if so who should be tested and in what order, it is usually necessary to be seen either at an HHT Center or a genetics clinic/department in your area.
