Fig. 8

A 68-year-old male patient with a history of colonic carcinoma under chemotherapy pathologically proved low-grade mucinoid adenocarcinoma, referred for follow-up. A Axial contrast-enhanced CT. B Axial PET slice at the same level. C Corresponding axial fused PET/CT image, showing peritoneal sheets and thickening seen along hepatic peritoneal surfaces scalloping its outline (yellow arrow) with low FDG uptake SUVmax =  ~ 2.4. Also, few scattered small nodules in the abdominal cavity underneath the anterior abdominal wall, inseparable from underlying small and large bowel loops of low FDG uptake. D Axial contrast-enhanced CT. E Axial PET slice at the same level. F Corresponding axial fused PET/CT image, showing irregular mural thickening of the distal part of the descending colon with focal soft tissue mass formation (red arrow) with intense metabolic activity eliciting SUVmax =  ~ 13. G Coronal PET/CT image demonstrating increased activity of the descending colon mass lesion (blue arrow) with low activity of the peritoneal deposits on the liver serosal surfaces