High-grade Primary Central Nervous System Lymphomatoid Granulomatosis: Successful Rituximab Monotherapy.

The primary central nervous system (CNS) presentation of lymphomatoid granulomatosis (LYG) is rare, and no standard therapy for LYG with primary CNS symptoms exists. CNS-LYG patients usually survive for only less than a year from diagnosis. This is the first report of high-grade primary CNS-LYG with monoclonality that was successfully treated with rituximab monotherapy, resulting in a durable remission for more than 1year in a 66-year-old woman with pemphigus vulgaris who was also on immunosuppressive therapy.