Thrombocytopenia 5, also known as thrombocytopenia, autosomal dominant, 5, is related to etv6 thrombocytopenia and predisposition to leukemia and thrombocytopenia, and has symptoms including petechiae of skin An important gene associated with Thrombocytopenia 5 is ETV6 (ETS Variant Transcription Factor 6). Affiliated tissues include bone marrow and bone, and related phenotypes are thrombocytopenia and increased mean corpuscular volume