A 35-year-old male suffered from a cough with sputum for one month. He was relatively healthy in the past and had a smoking history of 0.5 PPD for more than 10years. There was no fever, no dyspnea, no body weight loss and no special travel history. At the OPD, chest radiograph showed a cavity in the upper area of the right lung of 3.5cm×4.5cm with thin wall lesion. Chest computer tomography showed a thin wall cavitary lesion with irregular inner margin over the right apex area and an intracavitary ball-in-hole appearance mass (Fig.
