Figure 1. A-E blasts; F-I cytochemical myeloperoxidase ( MPO) on peripheral smear; J-N Flow results showing blasts within the gated region ( red) expressing cytoplasmic CD3, TdT, MPO(minor subset-green) and myeloid associated antigens CD13, CD33.Figure 1. A-E blasts; F-I cytochemical myeloperoxidase ( MPO) on peripheral smear; J-N Flow results showing blasts within the gated region ( red) expressing cytoplasmic CD3, TdT, MPO(minor subset-green) and myeloid associated antigens CD13, CD33.