Abstract
The possible association between serum and tissue CEA and recurrence of breast cancer was evaluated in patients. Serum CEA was positive before operation in 14.9% of the patients. The recurrence rate was significantly higher in those positive for serum CEA than those negative. Tissue CEA in the primary lesion was positive in 29.8% of the patients. The recurrence rate was significantly higher in those positive for tissue CEA than those negative. The recurrence rate was especially high (55.6%) in those positive for both serum and tissue CEA before operation. One month after operation, serum CEA became negative in 88.3% of the positive patients. When cancer recurred, serum CEA became positive in 62.5% of patients who had relapsed in 92.3% of the patients. The positivity or negativity of tissue CEA in primary lesions were in accord with that in metastatic lymphnodes and the recurrent lesions. Serum CEA frequently became positive during recurrence in the patients who had been positive for it before the operation. In 43.8% of the patients, serum CEA became positive clinical detection of the recurrent lesion. According to these results, measuring CEA is useful for the detection of recurrent lesions.
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