... and so a CT scan was recom-mended in all young patients with an idiopathic DVT.The ideal imaging modality to diagnose an IVC anomalymust have high diagnostic accuracy, and be safe andreproducible. ... Takehara N, Hasebe N, Enomoto S, Takeuchi T, Takahashi F, Ota T,Kawamura Y, Kikuchi K: Multiple and Recurrent SytemicThrombotic Events Associated with Congenital Anomaly ofInferior Vena Cava. ... thrombophilia screen isnegative.Knowledge of the association of other anomalies in thosewith an absent IVC, such as renal atrophy or agenesis canhighlight an underlying vascular anomaly, and can them-selves...