Johnny Cash announced Tuesday that he has developed Parkinson's disease, according to Heidi Robinson, Cash's spokeswoman at American Recordings.
The disease attacks the nervous system and is extremely difficult to contain. Though Cash was able to perform recent concert dates in support of his latest release, Unchained, he will opt out of his upcoming book signing tour for Cash: The Autobiography to deal with the illness. Cash's upcoming tour dates have been indefinitely postponed.
Cash's manager Lou Robin states, "Johnny feels confident that once the Parkinson's is medically stabilized, he can resume his normal work schedule." Parkinson's is the same disease that has plagued Muhammad Ali and Katherine Hepburn.