Unexpected focal fluorodeoxyglucose uptake in main organs; pass through or pass by?

Figure 1 Incidental focal right breast fluorine-18 fluorodeoxyglucose uptake. A: Focal mild to moderate uptake (arrow) is observed in the right chest on the maximum intensity projection image of a 32-year-old woman diagnosed with endometrial cancer; B: Axial image of fused positron emission tomography/computed tomography showing hypermetabolism (maximum standardized uptake value 3.3) in her right breast and the uptake was histopathologically confirmed as a ductal carcinoma in situ.