Prevalence and risk of deep vein thrombosis recurrence in Thai patients with iliac compression syndrome

Background: Iliac compression syndrome (ICS) results from compression of the left common iliac vein by the overlying right common iliac artery. The true prevalence of ICS remains unknown. Objectives: To study the prevalence of ICS in patients with deep vein thrombosis (DVT) of the legs and to evaluate outcomes, including recurrent DVT, pulmonary embolism, and postthrombotic syndrome, in ICS patients. Methods: We conducted a retospective study from January 2015 to December 2023. Patients objectively confirmed diagnosis of DVT who underwent imaging either CT or MRI of the lower abdomen were included. The imaging studies were reviewed by 2 radiologists. Results: = .01). Conclusion: The prevalence of ICS in DVT patients in this study was 37%. ICS was associated with an increased risk of recurrent DVT. ICS might be an underinvestigated contributor to recurrent DVT and warrants further exploration.