Figure 3From: FDG-PET scan in patients with clinically and/or radiologically suspicious colorectal cancer recurrence but normal CEATransaxial, sagittal, and coronal PET/CT fusion images demonstrating a ring-shaped liver lesion (arrow) with increased metabolic activity (SUVmax:5.5) surrounding a photopenic center in a patient previously treated with Yittrium-90 microspheres. CEA became positive two months after PET and subsequent pathology demonstrated tumor recurrence as well as nodal metastasis.Back to article page