Fig. 3
A 61-year-old male patient with a history of colon cancer treated by surgical resection. He was referred for PET/CT assessment due to elevated CEA. a, c, d Axial PET/CT cuts through the abdomen and the pelvis, b sagittal PET/CT through the pelvis showing the following: irregular thickening of the wall of distal transverse colon with hypermetabolic activity reaching up to 16 SUVmax proved to be malignant on endoscopy and biopsy (a); irregular mucosal mass at the rectum projecting into its lumen with hypermetabolic activity reaching up to 17.7 SUVmax (b, c); and the liver showing a small hypermetabolic focal lesion measuring 1 cm and achieving 7.6 SUVmax (d)