Harvard Health Blog
Hidden cancer rarely causes out-of-the-blue clots in the bloodstream
Posted June 29, 2015, 10:54 am Howard LeWine, M.D., Chief Medical Editor, Internet Publishing, Harvard Health Publications Blood clots can be lifesavers when they form outside the bloodstream to stop bleeding from an injury. But they can wreak havoc when they form inside the bloodstream. A blood clot in a coronary artery can cause a heart attack. One in the brain can cause a stroke.