Fig. 12. An 82-year-old man with an invasive mucinous adenocarcinoma and lung to lung metastasis.

A. The initial chest radiograph and CT show an almost lobar air-space consolidation in the right lower lobe (arrow), which can be interpreted as pneumonia.

B. Approximately 4 months later, there is an increased extent of the air-space consolidation in the right lung and a newly appeared lung to lung metastasis with multiple air-space consolidations in the left lung.