FIGURE 2. A 52-y-old woman with poorly differentiated squamous cell carcinoma of uterine cervix, FIGO stage IIa, underwent concurrent chemoradiation therapy. Four months after complement of treatment, an elevated serum SCC-Ag of 2.23 ng/mL was noted. Abdominopelvic MRI and chest RT showed negative findings. Two months later, her serum SCC-Ag level was 7.36 ng/mL. Conventional images still showed negative findings. A PET scan was then obtained and disclosed a metastatic lesion in the right lower lung. She subsequently received pneumonectomy and was well for 1 y.