A rare case of mucinous cystadenoma of the lung mimicking malignancy at 18F-FDG PET/CT.

We describe a rare case of pulmonary mucinous cystadenoma (PMCA) detected F-FDG PET/CT and mimicking a malignancy. A 60-year-old female patient underwent F-FDG PET/CT for metabolic characterization of a left pulmonary nodule which showed increased F-FDG uptake (SUVmax = 3.7). Based on this PET/CT finding, the patient underwent a cuneiform resection of the left pulmonary nodule. Histology demonstrated the presence of a PMCA. In our case, F-FDG PET/CT has been useful in detecting this rare pulmonary tumor.