Abstract
Serum levels of three glycoprotein tumour antigens (carcino-embryonic antigen, CEA; cancer-associated antigen 50, CA-50; gastrointestinal cancer-associated antigen, CA 19-9) were determined on 125 consecutive patients with tumours of the head and neck region. Elevated CEA values (> 5 units/ml) were found in 13/70 squamous cell carcinomas, 3/21 benign and 4/18 malignant salivary gland neoplasms. Elevated CA-50 values (> 17 units/ml) were found in 19/70 squamous cell carcinomas, 6/18 malignant and 1/21 benign salivary neoplasms. CA 19-9 displayed higher values (> 37 units/ml) in 9/68 squamous cell carcinomas, 4/18 malignant and none of 21 benign salivary gland tumours. Combination of CEA and CA-50 analyses increased the proportion of elevated values to 30/70 in squamous cell carcinomas and 10/18 in salivary gland malignancies. In squamous cell carcinomas no correlation between staging or grading and serum levels was detected for any of the markers. Among malignant salivary gland tumours, CA-50 displayed enhanced serum values in 4/6 mucoepidermoid carcinomas. The mean values for CA-50 and CA 19-9 serum levels were significantly higher for malignant salivary gland neoplasms compared to benign tumours. There was a close correlation between CA-50 and CA 19-9 serum levels. Although, the results suggest that at present none of the tumour markers tested have a place alone in the routine examination of patients with tumours affecting the head and neck region, further studies on salivary gland neoplasms and combinations of the tumour markers are justified.
Key words: Tumour marker, Carbohydrate antigen, squamous cell carcinoma, salivary gland neoplasm
Footnotes
This study was supported by grants from the Swedish Society for Cancer Research and Lions Research Foundation, Umeå Sweden
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