Carly Simon has been diagnosed with Parkinson’s disease and skin cancer. Carly Simon (Alamy Stock Photo)Parkinson’s disease is a neurodegenerative condition in which parts of the brain become progressively damaged over the years. Simon discussed her mobility issues and said there have been times when she has been unable to walk without help. Carly Simon rose to fame in the 1970s (Alamy Stock Photo)“After an extensive evaluation at the Mayo Clinic, I was diagnosed with Parkinson’s. Amid her Parkinson’s diagnosis, Simon revealed she has also been receiving treatment for basal cell carcinoma, the most common type of skin cancer.