Focal incidental colorectal fluorodeoxyglucose uptake: Should it be spotlighted?

Figure 3 Focal intestinal fluorine-18 fluorodeoxyglucose uptake. A: Maximum intensity projection depicting focal hypermetabolism superior to the urinary bladder (arrow) in an 88-year-old man diagnosed with non-small cell lung cancer; B: Axial view revealing focal hypermetabolism localized in the rectum; C: Non-contrast-enhanced computed tomography obtained from positron emission tomography/computed tomography, highlighting a space-occupying lesion within the rectum. Notably, a discernible posterior radioopaque area suggests the presence of residual contrast material from a prior contrast-enhanced examination. Subsequent colonoscopy and pathological analysis definitively identified the lesion as adenocarcinoma originating from the rectum.