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What is A patient with a previous history of tuberculosis now complains of hemoptysis. Chest x-ray reveals an upper lobe mass with a cavity and a crescent-shaped air-fluid level. Select the most likely etiologic agent. and explain in detail?
The patient who has a history of tuberculosis and now complains of haemoptysis would be revaluated for active tuberculosis. However, the chest x-ray described is characteristic of a fungus ball--almost always the result of an aspergilloma growing in a previous cavitary lesion.