[Myasthenic syndromes linked to mediator secretion disorders].

On the basis of clinical and electrophysiological examinations of 23 patients with an impaired secretion of the mediator, the following 5 groups of patients with myasthenic syndromes (MS) characterized by disturbances of the neuromuscular transision were identified: patients with bronchogenic carcinoma of the lung; males with a clinical picture closely resembling the one described in bronchogenic cancer of the lung; young males and females with an abnormal thyroid gland; patients with a mild subcortical syndrome and with ataxia; patients with chronic botulinic intoxication. Correlation of the results of electrophysiological examination did not reveal any specificity for any of the identified groups of patients.