There are a few "atypical Parkinsonism disorders," sometimes also called "Parkinson's-plus" disorders, including Progressive Supranuclear Palsy, Corticobasal Degeneration, and Multiple System Atrophy, that can look similar to Parkinson's disease. They are often misdiagnosed as Parkinson's. However, they tend to involve other or worse symptoms, progress much faster, and medications do not work well. Therefore, they cannot be treated the same as Parkinson's and therapists must pay particular attention to the unique aspects of these diagnoses in their assessment and treatment. You can learn more through CurePSP's booklet for allied health professionals as well as read more about these diagnoses at www.PSP.org