 <unk> stains on blood and bone marrow <unk> are helpful in the distinction of AML from ALL , and in <unk> of AML . The combination of a <unk> or Sudan black stain and a nonspecific esterase stain will provide the desired information in most cases . The <unk> or Sudan black reactions are most useful in establishing the identity of AML and distinguishing it from ALL . The nonspecific esterase stain is used to identify a <unk> component in <unk> and to distinguish a poorly differentiated <unk> leukemia from ALL . 
