This Acute Leukemia Contains Primarily Abnormal Promyelocytes with Heavy Granulation

Multiple Choice

This acute leukemia contains primarily abnormal promyelocytes with heavy granulation, and the presence of Auer rods is abundant. The cells react near 100% with Sudan black and peroxidase; however, the reaction is negative for non-specific esterase. Disseminating intravascular coagulation (DIC) is frequently associated with this disorder. What is the FAB classification?

A) M1
B) M6
C) M2
D) M3
E) M4