Casey Kasem, known for his years hosting the countdown shows "American Top 40" and "Casey's Top 40," is suffering from Parkinson's disease.
He's 81 and retired from his radio hosting in 2009.
According to Kerri Kasem, about three months ago, her stepmother, Jean Kasem, suddenly barred her sister, her uncle and some of Kasem's friends from seeing him. She's perplexed by the decision.
"I don't get it, I don't understand it," Kerri Kasem, who co-hosts the radio show "Sixx Sense" with Motley Crue's Nikki Sixx, told CNN. "He has Parkinson's and all the research we've done indicates socialization would help him."
"He can't really speak, but he knows we're there," she told the station. "And last time we saw him, he could shuffle a little bit. He had a hard, very hard, time walking. He was just deteriorating due to Parkinson's disease."
"He has Parkinson's, has it very bad. It took his speech, and for somebody who made millions of dollars using his voice -- for him to lose that gift, that beautiful instrument -- it must be frustrating. But he's handling it very well," Pitts said.
"His mind is very sharp, his brain works well. You can tell in his eyes he understands everything you're saying. He just has trouble translating it from the brain to his vocal cords."
Besides the famed countdown shows, Casey Kasem was also the voice of Shaggy in the cartoon "Scooby Doo" and an announcer for NBC. He was a popular DJ and occasional actor before "American Top 40" began in 1970.
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