Seropositive myasthenia gravis associated with small-cell lung carcinoma
Masayuki Ohira1, Dushin Jeong, Shin J Oh
1Department of Neurology, Keiyo University Medical School, Tokyo, Japan.
Background:
Lambert-Eaton myasthenic syndrome is well known to be a classical paraneoplastic syndrome of small cell lung carcinoma (SCLC). Three cases of seronegative myasthenia gravis (MG) and SCLC were previously reported.
Case Report:
A 65-year-old man developed a severe progressive respiratory failure with clinical features of MG. Tests showed a decremental response in the repetitive nerve stimulation test, abnormal single-fiber electromyography, and positive acetylcholine receptor antibody. SCLC was confirmed by the lung biopsy.
Conclusions:
This case represents the first case of seropositive MG and SCLC.
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