A case of Eaton-Lambert myasthenic syndrome associated with inappropriate secretion of antidiuretic hormone is reported. This case included a demyelinizing peripheral neuropathy and was related to a small-cell carcinoma of the lung. Twelve similar cases appeared in the literature, most of them associated with small-cell carcinoma or undifferentiated lung tumors. Etiologic and diagnostic aspects of these syndromes are discussed. When isolated, their causes are various, including the classic context of the paraneoplastic syndromes. Their association is highly suggestive of a lung carcinoma and must enable to make an early diagnosis by use of all possible means of detection.
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