Turns out Ten has injuries (as opposed to "illness," as the ISU had said yesterday).
Tweets from Denis Ten @Tenis_Den:
Thank you for supportive messages! I am extremely disappointed that I couldn't be at Skate America.. Missing my GP for the 1st time ever.
11:13 AM - 17 Oct 13
Answering your concerns, I've got 3 injuries at once. 2 swollen ankles and upper-back.
11:14 AM - 17 Oct 13
So used to skate in pain but we decided it wouldn't be smart this season.
11:15 AM - 17 Oct 13
Best to Ten.
ETA, exact quote from the ISU yesterday:
"2013 World silver medalist Denis Ten (KAZ) had to withdraw due to illness on October 16."