Carcinoembryonic antigen in patients treated with radiation therapy for invasive squamous cell carcinoma of the uterine cervix

Plasma carcinoembryonic antigen (CEA) levels in 75 patients with invasive cervical cancer were measured during and after radiation therapy. Initial CEA levels were elevated in 65% of the patients, the incidence varying with stage of disease. Of the 32 patients followed during therapy, CEA levels rose in 26 (81%). CEA values after therapy in the same 32 patients showed three patterns: (1) decline to normal, associated with a disease-free state; (2) decline but not to normal, associated with heavy cigarette smoking or persistent disease; and (3) decline to normal, followed by a rise to abnormal, associated with tumor recurrence. Elevation of CEA levels preceded recognition of recurrent cervical cancer by as much as 4 months in five of seven patients.
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