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Paraneoplastic stiff-person syndrome with lung cancer: a case report and literature review

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AMERICAN JOURNAL OF TRANSLATIONAL RESEARCH
卷 15, 期 1, 页码 330-335

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E-CENTURY PUBLISHING CORP

关键词

Stiff person syndrome (SPS); paraneoplastic syndrome; lung cancer; autoimmune response; anti-GAD65; benzodiazepines

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Stiff person syndrome (SPS) is a rare autoimmune disease characterized by stiffness and painful spasms of the trunk and lower limb muscles. Benzodiazepines are the preferred treatment for this disease. We present a case of SPS with symptoms including lower limb stiffness, convulsions, weakness, abdominal muscle stiffness, and painful spasms that worsened with fatigue or mental stimulation. The patient was diagnosed with adenocarcinoma in situ based on chest-enhanced computed tomography scan results. Treatment with clonazepam, diazepam, and pregabalin significantly relieved the symptoms. The clinical manifestations of SPS vary among patients, and early identification and treatment are crucial for improving prognosis.
Stiff person syndrome is a rare autoimmune disease of the central nervous system that manifests as stiff-ness and painful spasms of the trunk axis and lower limb muscles. Benzodiazepines are the first choice for the clinical treatment of the disease. We reported a case of SPS. The patient presented with stiffness and convulsions of lower limbs, weakness after convulsions, falling off easily, abdominal muscle stiffness, and painful spasms lasting for several minutes and alleviating spontaneously. This was caused or aggravated by fatigue or mental stimulation. Left stiffness and weakness of the muscle after relief was present. A chest-enhanced computed tomography scan (CT) suggested two large ground glass nodules in the upper lobe of the left lung. Biopsy pathology indicated the nod-ules as adenocarcinoma in situ. The patient's symptoms were significantly relieved after treatment with clonazepam and diazepam combined with pregabalin. The clinical manifestations of SPS vary among patients. The symptoms of the disease are mild or severe. Early identification and treatment can improve the prognoses of these patients.

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