Retinal periphlebitis is associated with multiple sclerosis severity. Ortiz-Pérez S, Martínez-Lapiscina EH, Gabilondo I, Fraga-Pumar E, Martínez-Heras E, Saiz A, Sanchez-Dalmau B, Villoslada P Neurology. 2013 Jul 31. PMID: 23902700. Abstract CommentRecommendBookmarkWatch