Pulmonary papillary tumors are usually occur in the upper respiratory tract, and solitary papilloma in the peripheral lung are extremely rare. Lung papillomas sometimes show the elevation of tumor marker or F18-fluorodeoxyglucose (FDG) uptake, and are difficult to distinguish from lung carcinoma. Here we report a case of mixed squamous cell and glandular papilloma in the peripheral lung. An 85-years-old man without smoking history had been presented with an 8-mm nodule in right lower lobe in chest computed tomographic (CT) 2 years before. Since the diameter of the nodule increased to 12 mm, and positron emission tomography (PET) revealed an abnormally increased FDG uptake in the mass (SUVmax 4.61). StageIA2 lung cancer (cT1bN0M0) was suspected and wedge resection of the lung to make a definitive diagnosis and for treatment was performed. The definite pathological diagnosis was mixed squamous cell and glandular papilloma.
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