Seronegative neuromyelitis optica spectrum disorder with longitudinally extending transverse myelitis and optic neuritis: A case report

INTRODUCTION: Neuromyelitis Optica (NMO; Devic syndrome,1894) is a CNS demyelinating syndrome. Significant proportion of neuromyelitis optica spectrum disorder is associated with Anti AQ4 Ab. The revised diagnostic criteria for neuromyelitis optica spectrum disorder (2015) has been proposed on the basis of Anti AQ4 Ab status. Most of cases reported has been found in females. It presents with multiple remissions. Common features of acute myelitis and optic neuritis seems to be the usual presentation. CASE PRESENTATION: Herein we report a case of a 35-year-old male with longitudinally extending transverse myelitis and Optic Neuritis with confirmation of Anti AQ4 Ab negative status with presentation of bilateral below knee weakness and incontinence of bowel and bladder. It was confirmed by Magnetic Resonance Imaging. CLINICAL DISCUSSION: Seronegative neuromyelitis optica spectrum disorder recently classified by 2015 diagnostic criteria associated with strict clinical presentations neuroimaging findings and exclusions of differentials. It presents with a poor prognosis particularly in relapsing course. CONCLUSION: We report a case of seronegative neuromyelitis optica spectrum disorder. The prognosis of relapsing course is poor. Early diagnosis and immunomodulators are required to decrease chances of recurrence. Further development of diagnostic modalities in seronegative neuromyelitis optica spectrum disorder is required.