[Aggravation following anaesthesia in a case of unknown lateral amyotrophic sclerosis (author's transl)].

A 66 year old man whose activity was almost normal underwent a lombar sympathectomy under general anesthesia (thiopental, gallamine, N2O). Immediately after recovery an acute respiratory distress became evident. It was due to a respiratory paralysis on which neostigmine had no effect. Neurologic examination showed the symptoms of an amyotrophic lateral sclerosis which had remained unknown so far. The respiratory paralysis persisted and one year later artificial ventilation is still necessary almost continuously. Two aspects of this very rare observation are discussed: first the cause and mecanisms of the aggravation of the neurologic disease following anesthesia, secondly the rather unusually important part played by the respiratory paralysis in this case of lateral amyotrophic sclerosis.