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Fig.2. —Sequential CT images of 5-year-3-month-old girl with unusual course of anomalous brachiocephalic vein (pattern a + b) (pound sign). Particular features include tetralogy of Fallot with atretic pulmonary trunk, hypoplastic right pulmonary artery, right-sided aortic arch, and aberrant left subclavian artery (arrowheads). Anomalous brachiocephalic vein is located on left, lateral and anterior to left common carotid artery (asterisk) at thoracic inlet. Before crossing beneath aortic arch, this vein passes in front of left common carotid artery. Entry of azygos arch (arrow) into superior vena cava (S) is lower than that of anomalous brachiocephalic vein. Several major aortopulmonary collateral arteries are evident around carina (C) and in subcarinal region. T = trachea, L = left pulmonary artery.