What's Wrong With Tom Glavine?

According to the Daily News, Tom Glavine's health and his season are in jeopardy, a potentially crushing blow to the pitcher as well as to the Mets' World Series ambitions. Sources said he has experienced coldness in a finger on his pitching hand, and that the cause of the alarming condition isn't yet known.
He is scheduled for a CT scan tomorrow, while an angiogram is planned for Wednesday.
Doctors are unsure whether the problem is related to a blood clot or possibly a "knot" in an artery near his left shoulder. Depending on the diagnosis, Glavine could miss little time or the rest of the season. The "knot" could require invasive surgery, while a clot might be able to be dissolved and limit the time lost.
Trainers conspicuously huddled multiple times with Willie Randolph yesterday, and Glavine hasn't been present in the clubhouse the past two days at Shea.