{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T07:08:01Z","timestamp":1771484881714,"version":"3.50.1"},"reference-count":31,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2009,4,3]],"date-time":"2009-04-03T00:00:00Z","timestamp":1238716800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Surgical Oncology"],"published-print":{"date-parts":[[2009,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p><jats:sc>L<\/jats:sc>\u2010type amino acid transporter 1 (LAT1) has been associated with tumor growth and is highly expressed in the primary human neoplasms. We investigated the significance of LAT1 expression to evaluate malignant potential in thymic epithelial tumors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Immunohistochemical studies of 45 surgically resected thymic epithelial tumors [15 noninvasive thymomas (NT), 22 invasive thymomas (IT), and 8 thymic carcinomas (TC)] were conducted. LAT1, Ki\u201067 labeling index (LI), vascular endothelial growth factor (VEGF), and microvessel density of the thymic epithelial tumors were analyzed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>LAT1 expression for thymomas and thymic carcinomas were 0 (0%) of 37 and 6 (75%) of eight patients, respectively. Ki\u201067 LI for NT, IT, and TC were 7.9\u2009\u00b1\u20092.8%, 16.1\u2009\u00b1\u20098.5%, and 50.6\u2009\u00b1\u200924.4%, respectively. VEGF expression in groups NT, IT, and TC was 0 (0%) of 15, 9 (41%) of 22, and 6 (75%) of eight patients, respectively. VEGF expression was statistically associated with microvessel count. The LAT1 expression was statistically associated with Ki\u201067 LI, VEGF, and microvessel density in thymic carcinomas.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>LAT1 is frequently expressed in thymic carcinomas but is absent in thymomas. Our results suggest that LAT1 expression might be an immunohistochemical marker for carcinomas, and could distinguish between thymomas and thymic carcinomas. J. Surg. Oncol. 2009;99:433\u2013438. \u00a9 2009 Wiley\u2010Liss, Inc.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jso.21277","type":"journal-article","created":{"date-parts":[[2009,4,3]],"date-time":"2009-04-03T14:50:52Z","timestamp":1238770252000},"page":"433-438","source":"Crossref","is-referenced-by-count":37,"title":["<scp>L<\/scp>\u2010type amino acid transporter 1 (LAT1) is frequently expressed in thymic carcinomas but is absent in 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