GRPR and neoplasm: Moreover, activity levels in GRPR-positive organs were noticeably reduced (pancreas by 70% and stomach by 40%) while tumor uptake was only decreased by 20% compared to [99mTc]Tc-N4-asp-MJ9 at 1 h p.i., pointing to a beneficial impact of the Bta-for-Trp8 substitution on clearance kinetics.