GSTM1 and demyelinating disease: Hemoglobin (Hb) level was found to be significantly lower in CNSL than in infectious and demyelinating diseases (p = 0.0002 and p = 0.0013, respectively), and although platelet counts were significantly lower in CNSL than demyelinating diseases (p = 0.0144), no significant difference was identified between infectious diseases and CNSL (p = 0.0952).