A Case of Cavitary Lung Cancer Complicated by Fungus Ball Type Aspergillosis

The patient was a 61 year-old male.First, his chest radiogram revealed a thin-walled cystic lesion containing a mass shadow in the cavity.Four months later, the cyst wall was irregularly thickened.Pulmonary aspergillosis of the fungus ball type was suspected from the X-ray findings, but the histological examination from the resected specimen revealed a combination of squamous cell carcinoma and aspergillosis in a cavitary space in the right upper lobe S2. Concerning the mechanism of combined occurrence, it was assumed that the carcinoma of the proximal bronchus developed cystic changes in the distal pulmonary tissue through a check-valve mechanism, and extended along the cyst wall, and then an aspergillar infection occurred secondarily.