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(A) Chest CT shows a mass larger than 4 cm in the right lower lobe (arrow). (B) Three-dimensional reconstructed CT image shows a normal RPA and absence of the left pulmonary artery, as well as compensatory hypertrophy of the collateral systemic arteries (arrows). Lung cancer is noted in the right lower lobe (asterisk). CT, computed tomography; RPA, right pulmonary artery.
