Thrombocytopenia 2, also known as thrombocytopenia, autosomal dominant, 2, is related to thrombocytopenia and radioulnar synostosis with amegakaryocytic thrombocytopenia 2. An important gene associated with Thrombocytopenia 2 is ANKRD26 (Ankyrin Repeat Domain Containing 26). Affiliated tissues include bone marrow and bone, and related phenotypes are thrombocytopenia and bruising susceptibility