I read your post with interest. I was diagnosed with Parkinsons in December of 1994 and treated until April of 1997. At that time my diagnosis came into question. I ultimately was seen at the Parkinson's institute in Sunnyvale, Ca. I was in fact misdiagnosed. I did not have PD. nor did I have essential tremor or PD+. The cause of my tremors was unknown. Ive always heard how difficult diagnosing neurological diseases can be. Thanks for your information... Allan