[18F]F-DOPA, which is transported via the dopamine transporter (DAT) into cells, has thus shown diagnostic advantages in the imaging of high- and low-grade malignancies like neuroendocrine tumors [23–27], pheochromocytoma [28, 29], and pancreatic adenocarcinoma [30–32] regarding diagnostic efficiency and sensitivity. Here, SLC6A3 is linked to neuroendocrine neoplasm.