Abstract

Yang et al.1 reported on reduced-dose rituximab treatment in NMO. To demonstrate the efficacy of rituximab, it is critical to show the relationship between the clinical response and B-cell depletion. Low-dose rituximab requires greater vigilance than conventional dosages, and appropriate monitoring is essential. However, the irregular B-cell monitoring (sometimes greater than 15 weeks) in this study is inadequate for determining the B-cell kinetics following low-dose rituximab. Consequently, the infusions were often administered after the reconstitution of B cells (greater than 3.5%) and exceeded the therapeutic target (greater than 1%). No relapse occurred despite marked reconstitution of B cells. Perhaps the result is not just a treatment effect but largely related to …

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