Our Treatment Outcomes in Patients with Acute Deep Vein Thrombosis Associated with Congenital Inferior Vena Cava Agenesis

Objectives: In this study, we present the treatment outcomes of patients with acute deep venous thrombosis (DVT) associated with congenital agenesis of the inferior vena cava (IVCA). Patients and Methods: In this retrospective study, the clinical findings and follow-up data of patients who were scheduled for an interventional procedure due to acute DVT in 2019-2021 and who were found to have IVCA in venography were analyzed retrospectively. Results: A total of 11 patients with acute DVT associated with IVCA were identified during the study period. Eight of the patients (72.7%) were male. The mean age of the patients was 25.5±6.5 years (16-36 years). Five of the patients were followed up with conservative medical treatment. Endovascular procedure was performed in six patients. At the end of the first year, moderate post-thrombotic syndrome was found in 1 patient and mild post-thrombotic syndrome was detected in 2 patients. Patients who received only medical treatment had a significantly higher Villalta score at the end of the first year than patients who received endovascular treatment (6.6±4.1 and 2.1±1.9, p=0.04). Conclusion: Congenital IVCA is a rare diagnosis that should be kept in mind in young patients with deep venous thrombosis. In these patients, endovascular approach may be effective to prevent postthrombotic syndrome.