Inferior Vena Cava Agenesis: A Rare Cause of Pelvic Congestion Syndrome.

Complete absence of Inferior Vena Cava (IVC) is a rare anomaly with a reported incidence of 0.0005% to 1%. This is often asymptomatic with incidental detection during cross-sectional imaging. It may also present with deep venous thrombosis, pulmonary thromboembolism or compressive symptoms in form of nerve root compression. Pelvic Congestion Syndrome (PCS) is an increasingly recognized entity with well laid out diagnostic criteria and evolving management protocols. Complete absence of IVC is a rare cause of pelvic congestion syndrome. We present a case of young female presenting with symptoms typical of pelvic venous congestion who was found to have complete absence of IVC as the underlying cause. She also had associated small left kidney with compensatory hypertrophy of the right kidney which is another rare association.