Immunoadsorption with staphylococcal protein A column in autoimmune encephalitis

Early treatment has a positive effect on autoimmune encephalitis. However, different treatments have individual differences and corresponding contraindications in the clinical. Few reports have described the application of immunoadsorption with Staphylococcal Protein A Column (SPA-IA) in neuroimmune diseases. We aimed to observe the safety and efficiency of SPA-IA in autoimmune encephalitis.We retrospectively analyzed three cases of autoimmune encephalitis wherein the first-line treatment was ineffective or contraindicated. The clinical features and prognosis during and after SPA-IA are described in detail.All patients were definitely diagnosed with autoimmune encephalitis. After treated with SPA-IA, all antibody titers, except for the serum antibody titer in Patient 2, were markedly decreased in both the cerebral spinal fluid and serum. The mean fibrinogen levels before and after SPA-IA were stable, and there were no clinical bleeding events. The modified Rankin Scale scores and their symptoms improved significantly after the last SPA-IA session or 3 months later.SPA-IA may be a viable, efficacious, and safe treatment alternative for autoimmune encephalitis with contraindications to traditional treatment or poor response.