Pulmonary varix associated with an anomalous unilateral single pulmonary vein mimicking pulmonary arterio-venous malformation

A 52-year old female was admitted for treatment of lung cancer in the right upper lobe. A left-sided serpentine opacity was incidentally detected and a pulmonary arterio-venous malformation was suspected (Fig. 1). However, pulmonary varix associated with an anomalous unilateral single pulmonary vein was diagnosed by imaging studies (Fig. 2, Supplementary Video 1). Supplementary material (Video 1) is available at EJCTS online. Video 1: Left upper lobar selective pulmonary artery angiogram.