Efgartigimod in the treatment of immune checkpoint inhibitor-related myasthenia gravis -myositis overlap syndrome: a case report - Summary - MDSpire

Efgartigimod in the treatment of immune checkpoint inhibitor-related myasthenia gravis -myositis overlap syndrome: a case report

  • By

  • Ke Li

  • Juanjuan Hu

  • Zhiji Gan

  • Jiao Chen

  • Ye Tian

  • Ruiqing Luo

  • Xueliang Qi

  • July 15, 2026

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Objective:

To examine the therapeutic effect of efgartigimod in a patient with cervical cancer who developed ICI-related MG-myositis overlap syndrome after receiving tislelizumab.

Approach:
  • Patient Data Collection: Clinical data from the patient was collected, including laboratory tests and examinations.
  • Efgartigimod Treatment: Efgartigimod was administered, and clinical severity was evaluated using standardized assessment scales.
Key Findings:
  • A 69-year-old female with cervical cancer developed bilateral ptosis, dysarthria, and limb weakness following tislelizumab therapy.
  • Serum creatine kinase was markedly elevated at 553.82 U/L.
  • After four infusions of efgartigimod (10 mg/kg), creatine kinase normalized, ADL score decreased from 10 to 1, and QMG score improved from 16 to 5.
  • The patient was asymptomatic at the 5 months follow-up with no need for a second treatment cycle.
Interpretation:

Limitations:
  • Only one case study is presented, limiting generalizability.
  • Further research is needed to establish broader efficacy and safety of efgartigimod in this context.
Conclusion:

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