Vice President Dick Cheney was diagnosed just in time. The late NBC News correspondent David Bloom died from it.
DVT, deep vein thrombosis, and its impact on public figures has seemingly created an awareness revival, particularly by Bloom's widow Melanie, now the spokeswoman for the Coalition to Prevent Deep-Vein Thrombosis.
"The statistics show that 2 million Americans will develop a DVT each year," she says. "Out of that, 600,000 will go on to develop the pulmonary embolism. Out of that number, 300,000 will be fatal.
"That's a lot more than AIDS and breast cancer combined every year in the U.S. The numbers are staggering."
What exactly is deep vein thrombosis and who is at risk?
There are two types of deep vein thrombosis, said Dr. Michael Ombrellino, a vascular surgeon with the Vein Institute of New Jersey in Morristown.