In a recent study performed in postmortem MS brain tissue (53), T cells, mainly CD8 T cells, recovered from WM lesions did not recognize nine candidate CNS autoantigens, including MBP, but did recognize autologous EBV‐transformed B-cell lines; however, the cognate antigen, EBV or a B-cell-associated antigen, was not identified. The gene discussed is MBP; the disease is myeloid sarcoma.