1 Department of Neurology (K.O., T.H., M.K.), and the Department of Radiology (S.K.), University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan; the Department of Neurology (T.T.), Tohoku University Graduate School of Medicine, Sendai, Japan; the Department of Neurology (T.T.), Yonezawa National Hospital, Yamagata, Japan; and the Department of Pathology (J.H.), Gunma University Hospital, Maebashi, Maebashi, Japan.