How did this leak to the press? That's a highly sensitive personal situation that no one should be revealing unless its Lester himself. Sometimes the media here stinks.
The story is purely speculative. It says he is being tested for cancer AMONG OTHER THINGS as the cause for enlarged nodes. While it is of possible concern, this thread belongs in the baseball forum and not here.
Baseball is a nonfactor here....good luck to Lester and hopefully it is an infection. My wife gets that every now and then...our body is full of those things...it wears on you each and every time....good luck again to Lester.