Figure 17a. Melanoma in a 33-year-old man. The extent of disease was evaluated with FDG PET-CT. Axial (a) and sagittal (b) fused FDG PET-CT images show focal hypermetabolism in the left paraspinal soft tissue (arrow in a) and in T8 (arrow in b), findings consistent with metastases. CT showed only subtle areas of decreased attenuation. Arrowheads in a = misregistration artifact due to cardiac motion.