Incidental anal 18fluorodeoxyglucose uptake: Should we further examine the patient?

Figure 1 Flow chart. Among the 144 patients with non-incidental uptake, 121 had known anal cancer; 14 had pelvic cancer with known anal extension; 2 had a known abnormality on anorectal examination at the time of the positron emission tomography with computed tomography; 7 had recent pelvic radiotherapy or surgery. PET/CT: Positron emission tomography with computed tomography.