A diagnosis of HHT can often be made based on a physical
examination, results of imaging tests and a family history.
However, some symptoms may not yet be apparent in children or
young adults at the time another family member is diagnosed with
HHT. Signs and symptoms of telangiectases and AVMs include
shortness of breath, recurrent headaches, seizures, vision
changes, anemia and blood in the stool. Symptoms depend on the
location of the AVM. A clinical diagnosis of HHT can be made if
you have at least three of these four criteria: - Recurrent
nosebleeds that seem to start for no reason - Visible
telangiectases on your lips, the inside of your mouth, your
fingers or your nose - Internal telangiectases or AVMs on your
lungs, brain, digestive tract or liver - Family history of a
parent, sibling or child with HHT Genetic testing is available
to identify the genetic cause of HHT and may sometimes help
confirm a suspected diagnosis. If the test confirms the genetic
cause of your HHT, this information can be used to