title: The use of serial CEA determinations to predict recurrence of colon cancer and when to do a second-look operation.
abstract: The concept of second-look surgery was introduced by Wangensteen 25 years ago, and 17% of patients were reported to be converted to a cancer-free state. Instead of an arbitrary time interval for reoperation, serial CEA values were used as the indicator of colon cancer recurrence and second-look operation. Twenty-two retrospective and 18 prospective patients were evaluable. There was no operative mortality. The CEA Nomogram was used to determine whether the CEA change was significant. All patient-samples were analyzed in duplicate, stored, and compared with the most recent sample; therefore, each patient served as his own control. The prospective results emphasize the importance of minimizing the time delay between a significant change in CEA values and reoperation. Equally important are the frequency of serial determinations (every one or two months), a thorough understanding of the limitations of the CEA radioimmunoassay, and the clinical condition of the patient.
mesh_terms: D002272:Carcinoembryonic Antigen / Q000032:analysis; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis*; D011446:Prospective Studies; D011863:Radioimmunoassay; D012189:Retrospective Studies
chemical_list: D002272:Carcinoembryonic Antigen