How do you approach tapering immunosuppression in a patient with a history of Susac Syndrome who has stabilized on MMF and IVIG?

Susac's is a rare disease characterized by an occlusive retinal vasculopathy, eighth nerve disease including hearing loss and balance issues, and CNS disease with a predilection for involvement of the corpus callosum. I am not aware of any randomized controlled data to guide treatment for Susac's, b...