Figure 3. 58-year-old male with Mycobacterium avium complex lung disease. (a) Selected view of left upper lobe demonstrates an ill defined round opacity (arrow) with a cavity (curved arrow). (b) High resolution CT image demonstrates a 17 mm diameter thick-walled cavitary region of consolidation affecting the left upper lobe. A nodule affects the right upper lobe posteriorly. Centrilobular emphysema is demonstrated affecting both lungs.

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