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This schema, although not originally intended as a new histological classification, but rather as a means for translating equivalent terms from the various existing classifications, has represented a major step forward in this direction. However, problems still exist with the WHO schema, particularly with some of the criteria for the various histological subtypes as well as with issues of interobserver reproducibility. For this reason, we favour using a much more simplified approach to the morphological classification of thymic epithelial neoplasms. A personal approach to the morphological diagnosis of thymoma is described, with a brief explanation for the rationale for simplifying the existing diagnostic categories.<\/jats:p>","DOI":"10.1136\/jcp.2005.031138","type":"journal-article","created":{"date-parts":[[2006,5,5]],"date-time":"2006-05-05T20:32:00Z","timestamp":1146861120000},"page":"1238-1244","source":"Crossref","is-referenced-by-count":37,"title":["Diagnosis of thymoma"],"prefix":"10.1136","volume":"59","author":[{"given":"S","family":"Suster","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2006,5,5]]},"reference":[{"key":"2025120520055786000_59.12.1238.1","unstructured":"Travis WD, Brambilla E, Muller-Hermelink HK, et al. Pathology and genetics of tumors of the lung, pleura, thymus and heart. In: World Health Organization classification of tumours. 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