Figure 8. 40-year-old woman with combined right middle and lower lobe atelectasis due to bronchial tuberculosis. (a) Posteroanterior radiograph shows a mass-like opacity with a convex lateral margin. A thymoma was suspected as the patient had been suffering from myasthenia gravis. (b) CT clearly demonstrates atelectatic right middle lobe (arrow) and right lower lobe (arrowhead) with dilated bronchi containing mucus. Bronchial tuberculosis was confirmed at right middle and lower lobe.