<prompt> Non specific esterase is positive in all the categories of AML except -M3M4M5M6  <response>: Ans. is d i.e., M6 o FAB classification divides AML into eight types M 0 to M7. o This scheme takes into account : ? i The degree of maturation MO to M3 ii The lineage of leukemic blast M4 to M7. Class Blast cells o Myeloperoxidase negative Mo minimally differentiatedAML o Auer rods negative o Express myeloid lineage antigen o 3 blasts myeloperoxidase positive M AML without differentiation o Auer rods positive o Full range of myeloid maturation MZ AML with maturation o Myeloperoxidase positive o Auer rods positive 