Asa et al. in a recent comparative study that enrolled 46 MTC patients with elevated calcitonin and/or CEA serum levels, evaluated the performance of [18F]FDOPA PET/CT and [68Ga]Ga-DOTA-TATE in the detection of recurrent or metastatic MTC [124]. Here, CALCA is linked to medullary thyroid gland carcinoma.