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Prognostic value of the sixth edition of the UICC's TNM classification and stage grouping for oral cancer
Author(s) -
Kreppel Matthias,
Eich Hans Theodor,
Kübler Alexander,
Zöller Joachim E.,
Scheer Martin
Publication year - 2010
Publication title -
journal of surgical oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.201
H-Index - 111
eISSN - 1096-9098
pISSN - 0022-4790
DOI - 10.1002/jso.21547
Subject(s) - medicine , stage (stratigraphy) , univariate analysis , multivariate analysis , t stage , cancer , basal cell , oncology , tnm staging system , survival analysis , oral cavity , overall survival , gastroenterology , staging system , paleontology , biology , orthodontics
Background Carcinoma of the oral cavity is classified according to the TNM staging system of the UICC. The staging system is under continuous revision. The aim of our study was to assess the prognostic value of the UICC sixth edition for oral cancer, which was established in 2003. Methods Three‐hundred treatment‐naive patients with oral squamous cell carcinoma (OSCC) of stages I–IVb were reviewed retrospectively. Patients with stage‐I disease were treated solely surgically, and patients with stage II–IVb received a multimodal treatment. Overall survival was plotted by Kaplan–Meier analysis. Prognostic factors were identified through univariate and multivariate analysis. Results Univariate analysis showed a significant impact of T stage ( P = 0.009), N stage ( P < 0.001), and UICC stage ( P < 0.001) on overall survival. However, no statistical differences were observed between stages T4a and T4b ( P = 0.176) and UICC stages IVa and IVb ( P = 0.306). Conclusions T stage, N stage, and UICC stage grouping are good predictors of overall survival in patients with OSCC. Neither the division of stage T4 into T4a and T4b in the sixth edition nor the split of stage IV into IVa and IVb showed significant differences in overall survival between the subgroups. J. Surg. Oncol. 2010;102:443–449. © 2010 Wiley‐Liss, Inc.