Abstract
Patients with squamous cell carcinoma of the anal canal occasionally present with an elevated level of carcinoembryonic antigen (CEA) in serum. The present study was performed to evaluate the clinical importance of this observation. Serum CEA was measured in 106 patients prior to chemo- and radiotherapy and during follow-up. Twenty patients had elevated serum CEA level before treatment. In 6 of 12 cases, serum CEA did not normalize after successful treatment and in 4 of 7 cases it rose no further despite progressive disease. CEA-positive tumours were more often poorly differentiated than CEA-negative tumours. There was no significant correlation between serum CEA, tumour CEA and prognosis. We conclude that measurement of serum CEA and staining of tumour CEA lack clinical importance.
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