Abstract
The clinical importance of serum squamous cell carcinoma antigen (SCCA) and SCCA subclasses has not been established for treating inverted papilloma (IP). The aim of this study was to clarify the clinical importance of serum SCCA and its subclasses in IP, compared with maxillary squamous cell carcinoma and inflammatory disease. Serum SCCA was measured in 22 patients with IP (IP group), 11 with maxillary squamous cell carcinoma (carcinoma group), and 22 with inflammatory disease (inflammatory group). mRNA expression of SCCA subclasses was examined using quantitative real-time polymerase chain reaction. In the IP group, 81.8% showed elevated serum SCCA, and 90.3% with recurrent IP showed elevated SCCA. The preoperative SCCA value (mean ± SD, 3.99 ± 4.39) in the IP group was significantly higher than in the carcinoma (1.28 ± 0.88; p = 0.012) and inflammatory (0.60 ± 0.31; p < 0.001) groups. mRNA expression of SCCA1 and SCCA2 in the IP group was higher than in the carcinoma and inflammatory groups. The SCCA2/SCCA1 ratio of mRNA expression (0.11 ± 0.06) in the IP group was similar to that (0.11 ± 0.09) in the inflammatory group, although the ratio (0.20 ± 0.12) in the carcinoma group was significantly higher than in the IP and inflammatory groups. The receiver operating characteristic curve analysis for the SCCA2/SCCA1 ratio to detect carcinoma yielded an area under the curve of 0.760 (95% confidence interval, 0.626-0.894). The serum level of SCCA is effective for detecting IP, including recurrent IP. In contrast, the SCCA2/SCCA1 ratio is useful for detecting squamous cell carcinoma among other sinonasal diseases.
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