Conjugated compounds which comprises an CCK A receptor binding moiety and a radiostable active moiety are disclosed. Pharmaceutical compositions comprising conjugated compound which comprises an CCK A receptor binding moiety and a radiostable active moiety or an CCK A receptor binding moiety and a radioactive active moiety are disclosed. Methods of treating an individual suspected of suffering from pancreatic cancer are disclosed. Methods of radioimaging pancreatic cancer cells are disclosed. In vitro methods, kits and reagents are disclosed for determining whether or not an individual has pancreatic cancer cells, for determining whether tumor cells are pancreatic in origin and for analyzing tissue samples to evaluate the extent of metastasis of pancreatic tumor cells.