<unk>  (MTS) is thought to represent between two and five percent of lower-extremity venous disorders.<unk>  is often unrecognized; however, current estimates are that this condition is three times more common in women than in men. The classic syndrome typically presents in the second to fourth decades of life. In the 21st century in a broader disease profile, the syndrome acts as a permissive lesion and becomes symptomatic when something else happens such as, following trauma, a change in functional status such as swelling following orthopaedic joint replacement.
May–Thurner syndrome
Van Wyk and Grumbach syndrome
Helsmoortel-Van der Aa syndrome
Wells-Jankovic syndrome
Jeavons syndrome
Crome syndrome
Bogart–Bacall syndrome
Keutel syndrome