found that p75NTR is expressed on NG2-positive (an integral membrane chondroitin sulfate protein glycan expressed by oligodendrocyte progenitor cells) oligodendrocyte progenitor cells in periventricular plaques, in the subventricular zone adjacent to plaques, and in the corpus callosum of patients with MS (83). Here, NGFR is linked to myeloid sarcoma.