In contrast, this SF did not correlate with the canonical receptor SST5 in GHomas (r: −0.037; p = 0.862) or ACTHomas (r: 0.140; p = 0.567) but directly correlated with SST5 in NFPTs (r: 0.329; p = 0.004). Here, SSTR5 is linked to ACTH-producing pituitary gland adenoma.