Concurrent Inferior Vena Cava syndrome and spontaneous retroperitoneal haemorrhage secondary to Inferior Vena Cava filter thrombosis, treated with large bore mechanical thrombectomy: a case report

Abstract Inferior Vena Cava (IVC) filters are an established treatment option to prevent morbidity and mortality in patients who are at high risk for pulmonary embolus and unable to receive pharmacological anticoagulation. As their use increases, we are now seeing an increasing incidence of associated complications, IVC thrombosis is one of them and can be challenging to treat. Our report describes a rare case of a 55-year-old male patient with active metastatic lung cancer presenting with concurrent inferior vena cava syndrome and spontaneous retroperitoneal haemorrhage due to an occlusive IVC filter associated thrombus. The case demonstrates successful treatment with large bore mechanical thrombectomy. Our case aims to provide insight into a rare yet complex complication which can occur due to IVC filter use. Our hope is that this case increases awareness of how to successfully manage concurrent IVC filter thrombosis and resultant retroperitoneal haemorrhage with large bore mechanical thrombectomy.