CCKBR and neoplasm: Furthermore, biodistribution experiments in tumour-bearing mice have not only confirmed indistinguishable in vivo behaviour for 111In-CP04 prepared by the freeze-dried kit or by wet-labelling, but also the high and CCK2R-specific tumour-targeting efficacy of 111In-CP04 as well as the role of gelofusine in significantly reducing renal retention.