Studies have shown the efficacy of immunosuppressants against neuromyelitis optica (NMO). Rituximab is recommended as an off-label prescription to treat refractory NMO. However, we describe two such patients who were suboptimally responsive to rituximab and whose symptoms worsened after treatment. Our cautionary cases highlight that in a small proportion of patients with refractory NMO, rituximab may either fail or induce rapid relapse of NMO. This suggests we need to consider new treatment strategies for refractory NMO.
Keywords: Neuromyelitis optica; Relapse; Rituximab; Therapy.
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