The Alliance to Cure Cavernous Malformation offers free genetic testing to patients in the United States and Canada with multiple cavernous malformations that can't be explained by a developmental venous anomaly or history of radiation. When you complete your Registry surveys, you will be asked if you would like more information about genetic testing. We will contact you within the next 6 weeks to share more information. The answers you provide to survey questions help us to determine whether you would be eligible. More information about the free genetic testing program can be found on the Alliance to Cure Cavernous Malformation website.