Phil: You are correct in stating that Parkinsonian Syndrome INCLUDES idiopathic Parkinson's Disease. Indeed, a Parkinsonian Syndrome is ANY disorder which causes symptoms similar to Parkinson's Disease. A syndrome is merely a collection of symptoms, and NOT a pathologic diagnosis. It may be a category of diseases with a number of symptoms in common. The most common cause of a Parkinsonian Syndrome is Parkinson's Disease, from which the Parkinsonian Syndrome category derives its name. ALL of the Parkinson PLUS diseases (such as multiple system atrophy, Shy Drager, PSP, cortical basal ganglionic degeneration, diffuse Lewy body disease, etc) are also Parkinsonian Syndromes. I hope that helps clarify the confusion. Jorge A Romero, MD -----Original Message----- From: Parkinson's Information Exchange Network [mailto:[log in to unmask]]On Behalf Of Phil Tompkins Sent: Wednesday, May 03, 2000 11:35 AM To: [log in to unmask] Subject: Re: Parkinson syndrome The terminology is confusing. Here is the complete entry covering PD in the Social Security "Listing of Impairments", which SSA uses to determine disability: "11.06 Parkinsonian syndrome with the following signs: Significant rigidity, bradykinesia, or tremor in two extremities, which, singly or in combination, result in sustained disturbance of gross and dexterous movements, or gait and station." This suggests that "Parkinsonian syndrome" includes idiopathic PD. I suspect that the terminology is rather old. Phil Tompkins Amherst, Mass age 62 / dx 1990