Rituximab Treatment for Polyneuropathy Induced by an Immune Checkpoint Inhibitor

ABSTRACT

Immune checkpoint inhibitor is associated with variety of immune-related adverse events. We present a case of polyneuropathy induced by immune checkpoint inhibitor, which was refractory to steroid and immunoglobulin. While high-dose steroid and immunoglobulin were not effective, we tried rituximab which is effective in other immune-mediated polyneuropathy. After rituximab treatment, patient's clinical symptom and nerve conduction study finding was markedly improved. We suggest rituximab might be effective in polyneuropathy induced by immune checkpoint inhibitor.