Case Report: Ofatumumab for the treatment of refractory anti-NMDAR-positive autoimmune encephalitis - Summary - MDSpire

Case Report: Ofatumumab for the treatment of refractory anti-NMDAR-positive autoimmune encephalitis

  • By

  • Yekai Ma

  • Yani Tang

  • Qinyue Peng

  • Weiqing Zhang

  • Yongjun Wu

  • Jun Chen

  • Susu Xiong

  • Dong Lv

  • June 10, 2026

  • 0 min

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Objective:

To evaluate the efficacy and safety of ofatumumab in patients with refractory anti-NMDAR encephalitis unresponsive to first-line and second-line immunotherapy, particularly focusing on the context of persistent symptoms.

Key Findings:
  • All three patients showed significant improvement in psychiatric symptoms and cognitive function after treatment, with specific metrics indicating a percentage change.
  • CD20+ B cell levels rapidly declined to extremely low levels.
  • Only one patient experienced mild bone pain and a low-grade fever; no severe adverse events were reported.
Interpretation:

Ofatumumab provides a rapid, safe, and effective approach to alleviate symptoms in refractory anti-NMDAR encephalitis, with potential implications for clinical practice.

Limitations:
  • The study consists of a small sample size with only three cases.
  • Current real-world data on OFA treatment for anti-NMDAR encephalitis is limited.
  • There is a lack of long-term follow-up data to assess sustained efficacy.
Conclusion:

Ofatumumab may be a promising therapeutic option for patients unresponsive to conventional treatments, highlighting the need for further studies to validate these findings.

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