Among patients with a pathologically confirmed PitNET, the subgroup comparison between correctly and incorrectly localized PitNETs using [11C]MET PET/MRI (n = 18 and n = 4, respectively) found no significant difference in terms of age, sex, BIPSS performed, tumor volume, TBR, Ki-67 index, ACTH serum level, and use of medical treatment (Table 1). Here, MKI67 is linked to neoplasm.