Benign versus Malignant Tumor Assessment

A 71 year old man with possible asbestos exposure had a chest x-ray and a contrast enhanced CT exam that revealed a 3 cm pleural based lesion in the right upper lobe.

A PET scan showed that the lesion was hypermetabolic and likely neoplastic. It also revealed a second lesion involving a paratracheal lymph node that represented early metastatic disease.

PET was used to evaluate the lesion seen on CT, confirm that it was malignant and identify early metastasis.