GRPR and neoplasm: This assertion is supported by the results obtained from a comparative study between [68Ga]-PSMA-11 and [68Ga]-RM2 (GRPR detection) in patients with mCRPC, which have shown that [68Ga]-PSMA-11 tumor uptake was superior to that of [68Ga]-RM2 in most mCRPC lesions [16].