Amegakaryocytic Thrombocytopenia, Congenital, 2, is also known as thrombocytopenia, megakaryocytic, congenital, type 2. An important gene associated with Amegakaryocytic Thrombocytopenia, Congenital, 2 is THPO (Thrombopoietin). Affiliated tissues include bone marrow and bone.