Being the TV trivia geek that I am, I went searching for info on Casey Peretti and came up with two options.
1] Casey Peretti is a stuntman who is also an amputee. He worked with JJ Abrams on an episode of 'Alias' called "Page 47". So this could be an in-joke shout-out to a former associate.
2] Casey Peretti was a doctor who died of encephalitis in June of 1990 in Oakdale on 'As The World Turns'. According to a TV Guide commenter named "Lost30Rock", Casey Peretti came from Boston, but I couldn't verify that from his biographical data page at Soap Central.
Still, I'll side with that splainin as it's more conducive for keeping the integrity of the TV Universe intact. It would seem that at some point in the last 18 years Peretti's family must have disinterred his remains and shipped them back to the Boston area to be reburied.