[An autopsied case of progressive spinal muscular atrophy showing tremor and choreiform movement].

A 42-year-old man without family history of neurologic disease developed muscle weakness, and wasting associated with tremor and choreiform movement. He died at age 75 with 33 years of total duration of illness. Autopsy revealed neuronal loss and gliosis in the anterior horns of the spinal cord, hypoglossal nuclei, caudate nuclei, putamen, globus pallidus, and substantia nigra. Bunina bodies or Lewy bodies were not seen. Several similar cases with motor neuron disease, dementia and parkinsonism have been reported in the literature. However, this pattern of chronic spinal neostriato-pallido-nigral degeneration has not been reported.