<prompt> All are treatable diseases of spinal cord EXCEPT ?ALSMultiple sclerosisSyringomyeliaA-V malformation  <response>: Answer- A. ALSInflammatory : Multiple sclerosis, Neuromyelitis optica, transverse myelitis, sarcoidosis, SLE, vasculitisDevelopmental : Syringomyelia, meningomyelocele, tethered cord.Metabolic: Vitamin B12 deficiency subacute combined degeneration, copper deficiency.Infections: CMV HSV, HTLV-I, HIV 