A much lower tumor uptake of 6–9% IA/g was previously reported in A431-CCK2R xenografts for [111In]In-CP04 (PP-F11, MG48) and [177Lu]Lu-PP-F11N at 4 h p.i. when using an injected peptide amount of 10–30 pmol [29,30,31]. This evidence concerns the gene CCKBR and neoplasm.