RESUMO
When a pre-existing lung cavity is colonized by Aspergilius fumigatus, it forms a fungal ball (pulmonary aspergilloma) and the presenting symptom is usually haemoptysis that may be massive and often-times life threatening. The radiological finding is that of a ball-like structure within a lung cavitation and the typical air crescent around the ball both on plain radiography and CT scan of the chest. The present case is of a 50-year-old male who had a 25-year history of heavy smoking (40 cigarettes per day) and haemoptysis. Although the cavitating lesion, ball-like structure and the crescenteric rim of air were present on the radiographs, the possibility of bronchogenic carcinoma was held high in view. Flexible fibreoptic and transbronchial biopsies were negative for malignancy. Sputum and bronchoalveolar lavage examinations showed neither malignant cells nor fungal elements. Right thoracotomy, cavernostomy, removal of the fungal ball and obliteration of the cavity by suturing (capitonnage) were done with an uneventful postoperative period.