Re:hemangiomas and siblings
For all who want to know if vascular birthmark are genetic, well the gene has not been confirmed. That means we cannot say they are genetic. For hemangiomas, we can sometimes say they are familial, meaning they MAY run in a family. For malformations such as port wine stains, lymphatic malformations, venous malformations and AVMs, they are more random and have very rare familial ties. Since 1 in 100 children are born with a vascular birthmark that requires a medical opinion, probability indicates that a random occurrence can also happen in a family. We are eager to find the answer and continue our research. Trust me, the day we know, it will be posted to the front page of this website.