The impact of thymoma histotype on prognosis in a worldwide database

The rarity of thymomas and lack of multi-institutional studies have hampered therapeutic progress for decades. To overcome this, the members of the International Thymic Malignancy Interest Group created a worldwide retrospective database. This database was analyzed regarding the demographic and geog...

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Hauptverfasser: Weis, Cleo-Aron Thias (VerfasserIn) , Marx, Alexander (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: February 2015
In: Journal of thoracic oncology
Year: 2015, Jahrgang: 10, Heft: 2, Pages: 367-372
ISSN:1556-1380
DOI:10.1097/JTO.0000000000000393
Online-Zugang:Verlag, teilw. kostenfrei, Volltext: http://dx.doi.org/10.1097/JTO.0000000000000393
Verlag, teilw. kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S1556086415323418
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Verfasserangaben:Cleo-Aron Weis, MD, MSc, Xiaopan Yao, PhD, Yanhong Deng, MPH, Frank C. Detterbeck, MD, Mirella Marino, MD, Andrew G. Nicholson, MD, James Huang, MD, Philipp Ströbel, MD, Alberto Antonicelli, MD, and Alexander Marx, MD, for the contributors to the ITMIG retrospective database

MARC

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520 |a The rarity of thymomas and lack of multi-institutional studies have hampered therapeutic progress for decades. To overcome this, the members of the International Thymic Malignancy Interest Group created a worldwide retrospective database. This database was analyzed regarding the demographic and geographic distribution of thymomas and the impact of different variables on survival and recurrence. This study analyzed 4221 thymomas diagnosed between 1983 and 2012 with World Health Organization histotype information from the International Thymic Malignancy Interest Group database. Associations to survival and recurrence were studied by univariate and multivariate analyses. Type B2 thymoma is the most common (28%) and type A the least common (12%) histotypes. They are significantly more frequent in Europe and the United States than Asia. Type A and AB occur at significantly higher age than other thymomas (64 and 57 years, respectively). There are no differences in gender distribution. Stage is lower in type A (90% in stages I-II) and AB than B1 to B3 thymomas (38% of type B3 in stage III). In univariate analysis, recurrence is significantly less frequent among stage I/II tumors, in type A and AB (recurrence rates, 1-2%) than B1 to B3 thymomas (2-7%). Multivariate analysis reveals an impact of age, stage, and resection status on survival and recurrence, whereas for histology there is only a significant impact on recurrence. New findings are (1) geographic differences such as a lower incidence of type A and B2 thymoma in Asia; and (2) impact of stage and histology, the latter partially limited to early stage disease, on recurrence. 
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