Fig. 2

FDG and FDS activity of the lesions. a-d. Both the pituitary and pituitary stalk lesions displayed FDG activity with an SUVmax of 5.5 after 40 min of radiotracer injection. e-f. Both lesions displayed FDS activity with a SUVmax of 1.1 at 30 min after FDS injection; in comparison, the SUVmax of the normal brain tissue was 0.15, and the T/N ratio was 7.3. g-h. The lesions remained FDS active after 120 min of FDS administration with a SUVmax of 0.73; the SUVmax of the normal brain and the T/N ratio were 0.08 and 9.1, respectively