Deep Venous Thrombosis and a Very Rare Finding: Inferior Vena Cava Infra-renal Segment Agenesis

Bilateral deep vein thrombosis (DVT) should prompt investigation for pro-thrombotic conditions and the exclusion of vascular compromise due to intrinsic and extrinsic factors. The authors present the case of a 47-year-old man admitted with bilateral DVT and diagnosed with inferior vena cava (IVC) infra-renal segment agenesis, and discuss the management of this rare condition. LEARNING POINTS: Bilateral deep vein thrombosis in young and otherwise healthy individuals should prompt investigation of the aetiology and risk factors in case life-long treatment and anticoagulation therapy is required. Although rare, anatomical variations and congenital malformations should be considered even in adult patients. Rare medical cases should prompt a multidisciplinary approach to investigation and treatment, as prognosis will depend on both therapeutic procedures and anticipation of complications.