CEACAM5 and small cell lung carcinoma: At first onset and relapse, the levels of tumor markers (CA125, CA153, CA199, carcinoembryonic antigen, α-fetoprotein, and serum ferritin) and lung CT, color Doppler ultrasonography of the urinary system, and gynecologic color Doppler ultrasound results were normal; small-cell lung cancer or teratoma was not detected.