 In adults, the depots that are most often detected in FDG-PET scans are the supraclavicular, paravertebral, mediastinal, para-aortic and suprarenal ones.It remains to be determined whether these depots are 'classical' brown adipose tissue or beige/brite fat.Brown fat in humans in the scientific and popular literature refers to two cell populations defined by both anatomical location and cellular morphology.