Advertisement Advertisement'You're So Vain' Singer Carly Simon Says Parkinson's And Cancer Diagnoses Kept Her From Public EyeArthritis is far more common than Parkinson's disease, affecting nearly 60 million U.S. adults compared with about 1.1 million Americans living with Parkinson's, according to the Centers for Disease Control and Prevention. Even so, about 90,000 Americans are diagnosed with Parkinson's disease each year, making it a relatively common neurological disorder despite being far less prevalent than arthritis. "Parkinson's disease can sometimes be misdiagnosed as arthritis, and vice versa," Schwartz, who specializes in Parkinson's disease, told Fox News Digital. "About a third of individuals with Parkinson's disease do not have a tremor," he said. Original article source: Carly Simon reveals the common condition that masked her Parkinson's diagnosis