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- CLINICA NEUROL, 64: 176|180, 2024
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Case Report
A case of Stiff-person syndrome with muscle tonicity of the extremities and neck after use of Dulvalumab for lung adenocarcinoma
Takashi Inoue, M.D., Kei Oiwa, M.D. and Kazuhiro Horiuchi, M.D.
Department of Neurology, Hakodate Municipal Hospital
A 74-year-old woman taking dulvalumab for lung adenocarcinoma developed muscle tonicity in the extremities and trunk. Painful paroxysmal muscle spasms with profuse sweating were frequently observed, and surface electromyography showed simultaneous contraction of the active and antagonist muscles. Blood tests were strongly positive for anti-amphiphysin antibodies, and stiff-person syndrome (SPS) was diagnosed. Intravenous immunoglobulin therapy and clonazepam were initiated, and the paroxysmal painful muscle spasms disappeared. As the primary tumor was under control, and the onset occurred approximately six weeks after the resumption of immune checkpoint inhibitors, we considered SPS to be an immune-related adverse event. Although extremely rare, it should be considered a neuromuscular disease that can occur in association with immune checkpoint inhibitors.
Full Text of this Article in PDF (1001K)
(CLINICA NEUROL, 64: 176|180, 2024)
key words: Stiff-person syndrome, immune-related adverse event, anti-amphiphysin antibody, lung cancer, intravenous immunoglobulin therapy
(Received: 5-Sep-23)