Figure 3. A. Necroinflammatory debris, consistent with Staphylococcus aureus  bronchitis (H&E, 200X). Gram stain (not pictured) showed gram positive cocci in clusters. B.Atypical carcinoid tumor (lower right) adjacent to bronchial cartilage (blue arrow) with focal necrosis (green arrow), (H&E, 40X). Insert (lower left) shows carcinoid tumor characterized by nests and trabeculae of uniform cells with stippled chromatin (H&E, 100X).