Abstract
A 74-year-old woman, who did not have any previous illness, was pointed out to have an abnormal shadow on a chest X-ray in 2003, and she was recommended to have a follow-up at the other hospital. Two years later, the chest X-ray showed increase of the mass shadow in the right lung field, but she did not complain any symptoms. A chest CT showed a 6×5 cm size cystic tumor in the right middle lobe of the lung. The confirmed diagnosis was not able to be obtained by a transbronchial lung biopsy. The culture specimens denied the presence of bacterial, fungal, and mycobacterial infection. We performed right middle lobectomy in November, 2005. Histopathologically, it was recognized that the cyst lumen had bronchial cartilage, and the wall was covered with bronchial epithelium. The contents of the cyst revealed fungal hyphae with broad, irregular branchings at right angles, and it was diagnosed as pulmonary mucormycosis. We considered the cavitary lesion was cystic bronchiectasis caused by fungal infection. She has remained in good health since the surgical treatment for two years.
