Phlebothrombosis - formation in a lumen of a vein of the thrombus fixed to a wall of a vein, in full or in part corking a vessel with connection of inflammatory changes in a venous wall.

Thrombophlebitis name inflammatory changes of a venous wall with the subsequent formation of a thrombus in a lumen of a vein. From the point of view of a modern phlebology there are no basic differences of a pathogenesis of a thrombophlebitis and a phlebothrombosis. At a clottage of a vein always there are inflammatory changes of a venous wall, and an inflammation of a wall veins (phlebitis) is accompanied by its clottage.

However experts on a phlebology, understanding reserve of similar division, use the term a thrombophlebitis at a lesion hypodermic, and a phlebothrombosis - deep veins. Exception the extremely rare today make only cases of purulent fusion of masses of thrombuses which can arise both in superficial, and in deep venous systems. In general the phlebitis, as a rule, has aseptic character, and the role of an infection is limited, apparently, to secondary changes of a hemocoagulation. Depending on localization of process distinguish a thrombophlebitis of superficial and deep veins. The term a varicose thrombophlebitis designate the most widespread form of a thrombophlebitis at which pathological process amazes varicose expanded superficial (hypodermic) veins of the bottom extremities. In overwhelming majority of cases it is complication of varicose illness. Varicose veins represent a fertile field for development of a clottage as changes of a vascular wall and retardation of a blood flow serve as the important reasons of a thrombogenesis.