Figure 10. Recurrent colorectal carcinoma in a 65-year-old man after surgical resection. FDG PET-CT was performed to evaluate for recurrence. Axial fused FDG PET-CT image of the pelvis shows a Foley catheter in the urinary bladder (straight solid arrow). Recurrent disease in the pelvis (curved arrow) may be obscured by an FDG-distended bladder if catheterization is not used. Open arrows = metastatic left inguinal lymph node.