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Deep vein thrombosis (DVT)
Deep Vein Thrombosis (DVT) is a condition in which a blood clot forms in one or more of the deep veins in the body, usually in the legs. This condition can cause leg pain or swelling but can also occur without any symptoms. DVT is a serious condition because blood clots in veins can break loose, travel through the bloodstream, and lodge in the lungs, blocking blood flow (pulmonary embolism).