Any hereditary hemorrhagic telangiectasia in which the cause of the disease is a mutation in the ACVRL1 gene. The disease is MONDO_0010880 (telangiectasia, hereditary hemorrhagic, type 2). Also known as: ACVRL1 hereditary hemorrhagic telangiectasia, hereditary hemorrhagic telangiectasia caused by mutation in ACVRL1.