My mother, Helen, aged 82, diagnosed for three years, has nor had any relatives that were diabetic nor any that were at least noticably alcoholic, she's right handed and her marked tremor is on her right side. She did, however, have breast implants, silicon, done some twenty-five years ago following surgery in the years fibrous conditions seemed to warrant such drastic responses. This year she was told that the sacks had burst three years ago. Her doctors knew but did not tell her. She worries that there's this little blob of silicon setting somewhere in her brain that caused her Parkinson's. Thank you all for all of the extraordinarily useful information from a daily lurker, Judith Guion