Beyond Anakinra and Tocilizumab: Additional Adjunctive Therapies in Pediatric New Onset Refractory Status Epilepticus and Febrile Infection-Related Epilepsy Syndrome - A Narrative Review.

New onset refractory status epilepticus and febrile infection-related epilepsy syndrome are rare and devastating entities in the pediatric population. While no known therapies have formally been established as the "gold standard" for management of the acute phase, consensus guidelines do establish interleukin therapies such as anakinra and tocilizumab as safe and effective second-line immunotherapeutic options. Despite the use of interleukin therapies, many patients continue to have super refractory status epilepticus. A number of publications (mainly case reports and case series) have described various adjunctive therapies in the management of new onset refractory status epilepticus/febrile infection-related epilepsy syndrome, including neuromodulatory therapies (such as vagal nerve stimulation, deep brain stimulation, and electroconvulsive therapy), surgical resection, noninterleukin immunotherapies (such as intrathecal dexamethasone, intravenous rituximab, and cyclophosphamide), infusions (such as lidocaine and magnesium), and anesthetic agents (such as sevoflurane). Utilizing a modified Preferred Reporting Items for Systematic reviews and Meta-Analyses approach, this narrative review summarizes the effectiveness and safety of second-line immunotherapies such as tocilizumab and anakinra, as well as the various adjunctive third-line therapies that aim to abort seizures and mitigate comorbidities within an intensive care setting, such as prolonged sedation and secondary systemic complications.