title: Limitations of CEA monitoring as a guide to second-look surgery in colorectal cancer follow-up.
abstract: Forty-two patients with localized colorectal cancer (Dukes' A, B, C stages) were treated with potentially curative surgery and controlled with a follow-up program, which included CEA monitoring, for a period ranging from 12 to 48 months (median 33 months). During this period, we observed recurrent neoplastic disease in 14 patients. A retrospective analysis of the results showed that: 1. patients with a preoperative CEA value greater than 20 ng/ml have a significantly higher risk of recurrence than the patients with CEA less than 20 ng/ml; 2. sensitivity of the CEA test was good for metastatic recurrent disease, fairly good for residual neoplastic disease, but insufficient for local recurrence; 3. test-specificity was poor, as demonstrated by the negative results of four exploratory laparotomies performed exclusively on the basis of increased CEA levels. Since the principal aim of a second-look operation is the cure of local recurrence, this type of surgery cannot be proposed only on the basis of increased CEA levels.
mesh_terms: D000328:Adult; D000368:Aged; D002272:Carcinoembryonic Antigen / Q000032:analysis*; D003110:Colonic Neoplasms / Q000276:immunology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis* / Q000601:surgery; D011379:Prognosis; D012004:Rectal Neoplasms / Q000276:immunology / Q000601:surgery*; D012086:Reoperation; D013997:Time Factors
chemical_list: D002272:Carcinoembryonic Antigen