SST and neoplasm: The primary indication of radiolabeled SST-analogues imaging is for neuroendocrine tumors (NETs), a heterogeneous group of neoplasms that arise from endocrine cells within glands (adrenal medulla, pituitary, and parathyroid) or from endocrine islets in thyroid, pancreas, or respiratory/gastrointestinal tract, which usually express a high density of SSTR.