what illness does michael j fox have?
Parkinson's disease
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 In an interview with NPR in April 2002 , Fox explained what he does when he becomes symptomatic during an interview ; 

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 Fox was diagnosed with Parkinson 's disease in 1991 , at age 29 , and disclosed his condition to the public in 1998 . Fox semi @-@ retired from acting in 2000 as the symptoms of his disease worsened . He has since become an advocate for research toward finding a cure ; he created the Michael J. Fox Foundation , and on March 5 , 2010 , Sweden 's Karolinska Institutet gave him a honoris causa doctorate for his work in advocating a cure for Parkinson 's disease . 

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 In 2004 , Fox guest starred in two episodes of the comedy @-@ drama Scrubs as Dr. Kevin Casey , a surgeon with severe obsessive @-@ compulsive disorder . The series was created by Spin City creator Bill Lawrence . In 2006 , he appeared in four episodes of Boston Legal as a lung cancer patient . The producers brought him back in a recurring role for Season three , beginning with the season premiere . Fox was nominated for an Emmy Award for best guest appearance . 

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 Fox then appeared in the first seven episodes of the eighth season , before departing the main cast . 

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 In August 2007 , Assad was diagnosed with Wolff – Parkinson – White syndrome , a rare condition that causes the heart to beat faster than normal . The condition was discovered during his tenure with WWE , when he had undergone a routine check @-@ up in accordance with WWE 's Talent Wellness Policy , which otherwise would have gone undetected until it was too late . 
