It cannot be said that leukemia m2 is the most serious, because acute myeloid leukemia is divided into m0 to m7, a total of eight types, m2 is one of them, among these eight types of leukemia, only type m3 is currently the best treatment effect of leukemia, other types of leukemia have their own characteristics. m2 type is also divided into low-risk, medium-risk and high-risk types according to the disease, so each different myeloid The severity of each type of myeloid leukemia is determined by its own pathological characteristics, including the number of leukocytes in the patient’s peripheral blood, bone marrow karyotype examination, and molecular biology examination, etc. These examination factors determine the severity of the disease, but not the severity of the disease based on m2, or m4, or m5. Currently the severity of AML is related to the number of leukocytes at the onset of the disease and whether there is a delay in treatment leading to a worse general condition, in addition to the genetic abnormality of the primary disease.