Figure 1. Upper panel: pretreatment whole-body FDG-PET showing a large area of heterogeneous FDG uptake in the right gluteal (SUVmax 4.68) and right upper thigh (SUVmax 3.73) regions corresponding to the clinically palpable and CT-described soft-tissue masses. Lower panel: follow-up FDG-PET for treatment monitoring showed a decrease in the relatively intense fair-sized focus at the superomedial aspect in the gluteus maximus muscle (the SUVmax reduced from 4.7 to 1.6, i.e. a reduction of 65.17%), whereas the right upper thigh focus revealed a marginal increase in SUV (from 3.7 to 3.8).