The use of 75Se-tagged methionine for photoscanning the pancreas has offered promise of improved and earlier diagnosis of pancreatic cancer. The diagnostic problem in patients with early carcinoma of the pancreas is well known: the lesion may be present for several months before objective evidence becomes sufficient to warrant exploratory laparotomy, or to permit definitive diagnosis. Anorexia, weight loss, intolerance to certain foods (meat), abdominal and back pain, change in bowel habits, and symptoms of a conversion neurosis or agitated depression plague patients with carcinoma of the pancreas. The signs and symptoms of pancreatic carcinoma are nonspecific and characterize other