Furthermore, [68 Ga]Ga-DOTA-MGS5 revealed high activity levels in the tumor (23.3 ± 4.7%ID/g), while displaying low activity uptake in the kidneys (5.7 ± 1.4%ID/g) at 1 h p.i. in A431-CCK-2R tumor-bearing nude mice [11, 12]. The gene discussed is CCKBR; the disease is neoplasm.