A rare case of pulmonary malignant granular cell tumor detected with 18F-FDG PET/CT imaging.

Malignant granular cell tumor is rarely involved in the lungs. We present a rare case with 18F-FDG PET/CT images showing a hypermetabolic lesion in the lower lobe of the left lung with posterior mediastinum invasion. Histopathologic study proved it as malignant granular cell tumor.