[A clinical study on CA 15-3, CEA, SCC-Ag in patients with squamous cell carcinoma of the lung]

The serum levels of CA 15-3, Carcinoembryonic antigen (CEA) and SCC-Ag were determined in 30 patients with squamous cell carcinoma of the lung. The patients were classified into 2 groups, a peripheral type and a central type, according to bronchoscopic findings. The obtained results were as follows: serum-CA 15-3 and serum-CEA were significantly elevated in patients with peripheral type, and serum-SCC-Ag was elevated in both types of squamous cell carcinoma.