What term is used when a clot dislodges and escapes either iliac or femoral veins?

The scenario described involves a clot that dislodges from its original position and travels through the venous system. The correct term for this occurrence is embolism, as it specifically refers to the process where a blood clot or other debris moves from one site in the body to another via the bloodstream.

When a clot, which may have initially formed in the iliac or femoral veins, dislodges, it can travel to the lungs, leading to a serious condition known as a pulmonary embolism. This process highlights how a localized issue can have systemic consequences, making the term "embolism" particularly relevant.

In contrast, deep vein thrombosis refers to the formation of a clot within a deep vein and does not specify dislodgement. Thrombophlebitis refers to inflammation of a vein associated with a clot, and varicose veins are swollen veins due to prolonged pressure, which does not involve clot movement.

Thus, the only term that accurately captures the phenomenon of a dislodged clot traveling through the venous system is embolism.