Figure 2a. Normal renal uptake as a potential pitfall in PET interpretation. The patient was a 57-year-old woman with a history of breast cancer. Axial CT (a), PET (b), and fused PET-CT (c) images show urinary FDG excretion involving the upper renal pole (arrow), a finding that may be confused with adrenal disease in the absence of CT correlation with adequate coregistration.