Radioactive Phosphorus in the Diagnosis of Gastrointestinal Cancer

The diagnosis of cancer in the inaccessible regions of the gastrointestinal tract is difficult at best. Neoplasia frequently advances insidiously and largely without the patient's knowledge. Ideally, simple survey tests applied periodically to those segments of the population considered most susceptible should be available. For all practical purposes such means of diagnosis are nonexistent. Those who specialize in gastro­ intestinal cancer must, therefore, do the best they can. The best consists