Encephalopathy, peripheral neuropathy, dysautonomia, myasthenia gravis, malignant thymoma, and antiacetylcholine receptor antibodies in the CSF.

A 54-year-old man suffered from multiple neurologic disturbances (polyneuropathy, encephalopathy, dysautonomia) associated with myasthenia gravis and malignant thymoma. No morphological signs of inflammation were present in the brain and peripheral nerves. Antiacetylcholine receptor antibodies were present in the brain and peripheral nerves.