Arteriovenous malformations (AVMs) are a common feature of HHT. They’re most likely to appear in your liver, lungs, and brain. According to various studies:
* Liver AVMs occur in 7.6% to 57.6% of people with HHT, depending on the type.
* Lung AVMs may affect 25% to 59% of people with HHT type 1 or 2.
* Brain AVMs occur in about 10.4% of people with HHT but are more common in people with type 1.