SSTR2 and neoplasm: Accordingly, the aim of this present in vivo/ex vivo study was to compare the anti-tumour activity and the potential toxicity of [177Lu]Lu-satoreotide tetraxetan to that of [177Lu]Lu-DOTA-TATE, which were both administered for a total of four cycles in mice bearing AR42J xenografts–a rat pancreatic cancer model expressing endogenous SST2.