In addition, CCK2 receptors are overexpressed in MTC, and scintigraphy DOTA-linked CCK agonists such as 111In-DOTA-CCK, 111In-DOTA-minigastrin 11, and 99Tc-demogastrin 2 for diagnostic imaging of MTC have yielded variable results (93). This evidence concerns the gene CCK and medullary thyroid gland carcinoma.