Periventricular lesions help differentiate neuromyelitis optica spectrum disorders from multiple sclerosis. Raz E, Loh JP, Saba L, Omari M, Herbert J, Lui Y, Kister I Mult Scler Int. 2014; 2014:986923. Epub 2014 Feb 09. PMID: 24665366. Abstract CommentRecommendBookmarkWatch