Incidentally Detected Inferior Vena Cava Anomalies: 3 Case Reports

Objective: Inferior vena cava (IVC) anomalies are very rare vascular embryological variations, the incidence rate in the general population is 0.5%. IVC anomalies are usually asymptomatic and detected incidentally. The inferior vena cava is formed between the 6th and 8th weeks of intrauterine embryological development. IVC occurs due to the fusion of the supracardinal, postcardinal, and subcardinal veins during the embryological period. This union results from complex anastomosis of the embryological stage veins. During this time, various IVC anomalies may develop. IVC anomalies increase the risk of deep vein thrombosis in the lower extremity. Because of the increased risk of deep vein thrombosis in these patients, anti-embolism prophylaxis can be performed before the operation. Therefore, the risk of pulmonary embolism increases as well. The use of computed tomography has become more common nowadays. The detection rate of IVC anomalies has increased in examinations performed for other purposes.    Case: IVC anomalies are important in terms of surgical interventions and the use of a vena cava filter. Knowing the existence of IVC anomalies can be crucial in preventing complications that may arise during surgical and radiological procedures. The objective of this study is to present three different cases with incidentally detected IVC anomalies.