Hughes-Stovin syndrome is a rare variant of Behcet's disease. However, unlike Behcet's which causes symptoms throughout the body, Hughes-Stovin generally only inflames the arteries of the lungs and the body's veins. This results in weakness of the arteries, leading to multiple aneurysms in the lungs, and frequent occurrences of deep-vein thrombosis. The former problem often leads to blood being coughed up in sputem.