Fig. 9

a–d follow-up PET/CT study for the same patient in Fig. 7. a MIP and b–d fused PETCT images revealed progression in size and metabolic activity of the previously noted metabolically active (FDG avid) circumferential polypoidal mural thickening involving the entire length of the rectum and rectosigmoid junction measuring about 2.2 cm at max thickness and 13 cm at max length with max SUV R 22.8 (compared to 17.26 previously). The lesion now extends to the anal canal blending with the previously noted right sided anal soft tissue nodule. It is seen that intimately related to the posterior wall of the urinary bladder with no definite signs of invasion. Low grade metabolically active right inguinal lymph node is still seen unchanged measuring about 1 cm with max SUV R 3.07