<prompt> According to FAB classification, the minimum blast cells for diagnosis of AML are20301040  <response>: 30: 362- Harsh mohan 6th edition According to revised FAB classification system a leukaemia is acute if the bone marrow consist of more than 30 blasts WHO classification for AML has revised and lowered the cut of percentage of marrow blasts to 20 from 30 in the FAB classification for making the diagnosis of AML 