Non specific esterase is positive in all categories of AML except:: (A) M3, (B) M4, (C) M5, (D) M6
Answer is D. NSE is characteristic of M4 and M5 leukemia only.NSE positivity is not characteristic feauture of other subclasses of AML. However NSE positivity may aldo be seen in 15-20 percent of cases of M7 NSE positivity is not a feauture of M0,M1,M2,M6 classes of AML.( ref Robbins 7th/759)