PRDX2 and myeloid sarcoma: Combining the measurements from all investigated regions (lesion center, lesion rim, peri-plaque white matter, NAWM of MS and control cases) a weak, albeit significant, positive correlation was found between the number of PRDX2-expressing astrocytes and the T cell infiltrate (Figure 2D) as well as the activation of microglia/macrophages (Figure 2E).