ABSTRACT OBJECTIVE: To determine the frequency of longitudinally extensive transverse myelitis and Causes of longitudinally extensive transverse myelitis METHODOLOGY: A Cross-Sectional, retrospective study was conducted at Neurology Department, Mayo Hospital, Lahore from 1st January 2015 to 31st December 2015. Patients were included from inpatient with history of weakness of lower limbs/all four limbs with or without visual disturbances. History and clinical examination was consistent with transverse myelitis. Neuroimaging (MRI brain, (orbit in case of optic neuritis) and spinal cord) was done followed by LP/CSF, Vasculitis screening