... pearls, 195 considerations, 190 – 191 differential diagnosis, 192 – 193 laboratory confirmation, 193 microscopic image of, 193 fsymptoms, 1 89 treatment options, 194 and Vitamin B12deficiency, 191 – 192 subarachnoid ... 199 clinical approach, 199 clinical pearls, 202considerations, 198 diagnosis, 201epidemiology, 199 etiologies, 199 –201, 200fmultiple sclerosis association, 199 , 201, 202, 208symptoms, 197 treatment ... 442Lyme disease, 191 , 192 , 255, 295 ,353, 435MMachado-Joseph disease (MJD),50t, 53macrocytic anemia, 191 , 192 , 195 magnetic resonance imaging (MRI)for acute cerebral infarct, 96 , 97 for ataxia,...