Coughing up blood, medically known as hemoptysis, involves coughing or spitting up blood or blood-streaked mucus from your respiratory tract (i.e. lungs and airways). Coughed-up blood may appear ...

In 1924, physician Eli Moschcowitz presented the world with a baffling new case: a teenager who had collapsed and died from a mysterious illness that left her body riddled with tiny blood clots.