[Comparative value of benzidine and alpha-naphthol for peroxidase reaction in leukemic cell (author's transl)]

A comparative study of the benzidine technic and alpha-naphthol + pyronine technic for peroxidase is performed in blast cells of 27 patients. In the great majority of cases the benzidine technic is far more sensitive than the alpha-naphthol technic. In regard to its low sensitivity this later technic is not relevant for classification of acute leukemia.