According to FAB classification, the minimum blast cells for diagnosis of AML are: (A) 20, (B) 30, (C) 10, (D) 40
Answer is B. (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