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. 2013 Sep 2;36(6):811–818. doi: 10.1002/hed.23380

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© 2013 The Authors. Head & Neck published by Wiley Periodicals, Inc.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Kaplan–Meier curves for cumulative mortality of patients from oral tongue squamous cell carcinoma (SCC; A1), and from other causes (A2) in relation to the worst pattern of invasion (WPOI). The patients with high WPOI (<15 cells in an invasive island, single cells, or satellite tumor cells) were associated with a higher mortality compared to those with a low WPOI score (pushing borders, finger-like, and cohesive invasion). [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]