Compared with [177Lu]Lu-RM2, [177Lu]Lu-AMTG showed mildly improved GRPR affinity, greater in vitro and in vivo stability, and 24 h post-injection tumour retention (11.45 ± 0.43%ID/g).167 In the first human clinical trial, [68Ga]Ga-AMTG PET/CT revealed multiple significant lesions with strong focal uptake between the peritoneum, the subdiaphragmatic region adjacent to the liver, and the left internal and external iliac arteries. This evidence concerns the gene GRPR and neoplasm.