Re: rapid onset of dementia--this is certainly troubling and seems unusual--though 15%-20% of PD patients do develop some dementia, it is usually more gradual. In the archives, did you look at the Algorithm for Managing PD, in four parts? There is quite a bit in part 3 about dementia. References are: Part 1 of 4 3268 633 Part 2/4 3269 545 Part3/4 3271 506 Part 4/4 3270 477 Has the neuro considered other possible factors than PD? Sometimes there seems to be a tendency once one is diagnosed to blame all problems on PD and overlook other possibilities. We do know that Alzheimer's can accompany PD in a few pat ients, as was true of a man in our support group--I do hope you get clarifica- tion and help soon! Camilla Flintermann,CG for Peter, 76/6