[Progressive autonomic failure with Parkinson's disease].

Progressive or primary autonomic failure (AF) is a disease of unknown-etiology, and presents generalized and extensive autonomic disturbances because of selective neuronal degeneration in the whole of autonomic nervous system. AF is classified into three categories; (1) pure autonomic failure, without associated neurological disorders, (2) AF with Parkinson's disease (PD), and (3) AF with multiple system atrophy (Shy-Drager syndrome) (Bannister, 1988). AF with PD is pathologically characterized by neuronal cell degeneration in the intermediolateral column and the substantia nigra, together with Lewy bodies mainly in the pigmented nuclei in the brain stem. Patients with PD occasionally develop syncope or dizziness due to orthostatic hypotension and/or postprandial hypotension as well as urorectal disturbances as the initial symptoms, and are followed by parkinsonism. Levodopa is usually effective for parkinsonism but the prognosis is rather poor. AF with PD could be regarded as a form of 'the Lewy body disease' according to Kosaka's clinicopathological entity (1984).