The pharmacokinetic of neuromedin N peptide in mice inoculated with HT-29 colon cancer cells is predominated by the fast clearance of tracers from the bloodstream (4.59 ± 0.49% ID/g for 68Ga-DOTA-NMN and 4.89 ± 0.53% ID/g of 68Ga-DOTA-NMN-AuNP). The gene discussed is NTS; the disease is malignant colon neoplasm.