I have read on this list and other places that PD is mis-diagnosised 25 to 30 percent of the time. So I have a question for the members of the list, which of the following cases is more likely? A. A person is told that they have something else and it is not reconized that they have PD. B. A person is told that they have PD, and it turns out they have something else, like for instance ET (essential tremor)? What would be the percent of each case, 80% A and 20% B or vice-versa. Anyone have some thoughts on this subject? Lanier Maddux Chattanooga Tn. ([log in to unmask])