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Fig. 2A —46-year-old man with adenocarcinoma in upper lobe of right lung and
biopsy-proven metastatic nodule in lower lobe of right lung. Transverse
lung-window CT scan at level of right upper lobar bronchus shows 5-mm nodule
(arrow) in superior segment of right lower lobe. Nodule was
pathologically proven metastatic adenocarcinoma. Bottom portion of primary
lung adenocarcinoma (arrowheads) is evident in right upper lobe.