Widespread multiple system degeneration in a patient with familial amyotrophic lateral sclerosis.

We report a 57-year-old woman with familial amyotrophic lateral sclerosis (ALS) with posterior column involvement of 11 years duration. The patient had been on a respirator for more than 5 years before death. In addition to the well established pathology of this form of familial ALS, there were obvious degenerative changes in the brainstem tegmentum, including the reticular formation, cerebellar cortex, dentate and red nuclei, thalamus and mammillary body. Of great interest in this case was intracytoplasmic accumulation of neurofilaments in the remaining neurons in these areas, some of which, for instance, those in the oculomotor and abducens nuclei, still showed only minimal loss. This patient had survived considerably beyond the point of respiratory failure, which is the final stage in the natural history of the disease. We considered that in this patient the underlying degenerative process of the disease had become manifested in wider areas than recognized previously during the prolonged clinical course due to respiratory support. However, whether or not such widespread degeneration would occur in all patients with this disease who survive longer with the help of respiratory support awaits further studies.