Fig. 7. Extrapulmonary pathologies on chest radiograph.

A. A 68-year-old man with an adenocarcinoma shows a mass opacity in the basal segment of the right lower lobe (arrowheads) overlapping with the right hemidiaphragm and hepatic shadow in the posteroanterior view. Reticular opacities in the periphery of both the lower lobes suggest interstitial pulmonary fibrosis. Axial chest CT shows peripheral lung cancer in the right lower lobe (arrow).

B. A 37-year-old man shows a retrocardiac paraspinal bulging opacity (arrows) with obliteration of the azygoesophageal recess (arrowheads), which is a malignant esophageal submucosal tumor.

C. An 82-year-old man with prostate cancer shows extensive osteolytic and osteosclerotic bone metastases in the entire axial skeleton.