Laboratory tests including WBC, CRP, ESR, urea, creatinine, Vit B12 and liver enzymes were within normal ranges. The infectious and virology profiles including HIV, hepatitis C, hepatitis B, syphilis, TB, and perlosy were negative. The immune profile including ANA, anti-phospholipid antibodies, C-ANCA, P-ANCA, and IgG4 were negative. Anti-aquaporin 4 antibody and anti-myelin oligodendrocyte glycoprotein antibody were also negatives. Cerebral spinal fluid analysis was normal.

Brain magnetic resonance imaging, and magnetic resonance vein were normal, and no findings suggestive of demyelinating disease or compressive lesions were found (Image-2).