In contrast, in the high grade entities such as the 10 DLBCL and the single PTCL case (36), the difference of Ki-67 expression between the respective populations was always higher ranging from 5.8 to 55.4% in DLBCL and was 89.7% in the PTCL case. Here, MKI67 is linked to mature T-cell and NK-cell non-Hodgkin lymphoma.