Rasmussen's encephalitis (RE), or chronic focal encephalitis, is a progressive neurologic condition consisting of cognitive regression, hemiparesis, and intractable epilepsy. While the etiology is unknown, evidence supports an autoimmune basis. Although steroids, plasmapheresis, and intravenous immunoglobulin (IVIg) may afford limited benefit, standard of care for pediatric cases typically invo...