<unk>  (also known as<unk>  venous thrombosis or<unk>  and colloquially referred to as economy class syndrome) is the formation of a blood clot ("thrombus") in a<unk>  vein. The risk is significantly increased if the thrombus embolizes to the lungs, causing pulmonary embolism. Occasionally, veins in the arm are also affected (known as Paget-Schrötter disease). Upper extremity<unk>  is less common but also may lead to PE, especially in the presence of a venous catheter. Thrombophlebitis is swelling (inflammation) of a vein caused by a blood clot. Venous thromboembolism (VTE) is a hypernym which includes<unk>  venous thrombosis <unk>  and pulmonary embolism (PE). It is a major public health problem and one of the most common cause of preventable cause of death in hospital patients. It is the third most common cardiovascular disorder after coronary artery disease and stroke. It is frequently underestimated and misdiagnosed and  failure to provide adequate prophylaxis and therapy can be fatal for the patient.
Deep vein thrombosis
Arterial thrombosis
Varicose veins
Superficial vein thrombosis
Venous ulcer
Blebitis
Thrombophlebitis
Leg ulcer