Cavitary coccidioidomycosis with fungus ball formation. Diagnosis by fiberoptic bronchoscopy with coexistence of hyphae and spherules.

Pulmonary cavitary coccidioidomycosis with fungus ball formation was observed in two individuals with hemoptysis. The first patient had no overt compromise; the second was an insulin-dependent diabetic. In both, fiberoptic bronchoscopy was performed and cultures yielded Coccidioides immitis. The coexistence of spherules and hyphae of C immitis was seen histologically on bronchoscopic biopsy specimen of one cavitary lesion. Specific antifungal therapy and surgical excision were withheld and each patient has done well. This report provides for the first time nonsurgical confirmation that C immitis can produce an intracavitary fungus ball.