Kate, you wrote and Mary Anne responded............... 3) How is it possible for Dad to deteriorate so quickly? In Sept. he >> was quite independant although my mother did not like to leave him >> alone for very long because of his falls. Is this typical of PD especially in >> the later stages? Could it be because of his age? Could it be caused by >> his medication? > >Such a rapid deterioration is curious. Do not allow doctors to assume >that his condition is due to PD without further examination. Has your Dad >had an MRI or a CAT scan? I agree with Mary Ann re: the MRI. It will rule out things such as tumors or hydrocephalus, which can mimic PD exactly. As I understand it, the deterioration can be very rapid in both these cases. Peace, John