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Fig. 11A —47-year-old man with endobronchial actinomycosis associated with broncholithiasis. Contrast-enhanced CT image obtained with mediastinal window settings shows small broncholith (arrow) obstructing bronchial lumen that supplies superior segment of right lower lobe. More distally, necrotic subsegmental consolidation containing mucoid material and another broncholith (arrowhead) is seen with bronchial dilatation. Also note small calcified hilar and subcarinal lymph nodes, suggesting previous tuberculous infection.