JAK 2 V617F Common Mutation test is performed on a sample of bone marrow to measure the level of JAK 2 - V617F Mutation in the bone marrow.It is performed to confirm Essential Thrombosis, Myeloproliferative Neoplasms and Polycythemia Vera and also during the treatment and after the treatment of Essential Thrombosis, Myeloproliferative Neoplasms and Polycythemia Vera.