MYH9 and autoimmune thrombocytopenic purpura: When compared with two different control populations of patients with thrombocytopenias from different causes, one with inherited thrombocytopenias other than MYH9-RD and the other with immune thrombocytopenia, or with a large population of people from a Sardinian geographic isolate, the ORs to have an elevation of liver enzymes for MYH9-RD patients ranged from 8.2 to 24.7, a highly significant increased risk.