Enhanced CT and FDG PET/CT in malignant solitary fibrous tumor of the lung.

Although some histological features of solitary fibrous tumor are related to its aggressive behavior, tumors with benign features may also follow an aggressive behavior. An 18-year-old male patient was referred after the detection of multiple bilateral pulmonary lesions on a chest x-ray in a health examination 2 months ago. These lesions showed inhomogeneous enhancement on enhanced CT and intense FDG uptake (SUVmax, 21.8) on PET/CT. CT-guided biopsy revealed histologically benign solitary fibrous tumor.