Histologic changes: Rounded consolidations with central necrosis containing PMNs (upper left) occurred in several areas and, when cavitated, accounted for the radiographic cavities. These areas were not walled off by dense connective tissue, and there was no evidence of a granulomatous response or angiitis. Although this area resembles a necrotizing pneumonia, no organisms could be identified with stains or cultures for bacteria or fungi. What is the diagnosis? Answer

Case 10--Clinical summaryDiagnosis and Discussion

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