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A PET-Based Nomogram for Oropharyngeal Cancers

J. Castelli, A. Depeursinge, V. Ndoh, J.O. Prior, M. Ozsahin, A. Devillers, H. Bouchaab, E. Chajon, R. de Crevoisier, N. Scher, F. Jegoux, B. Laguerre, B. De Bari, J. Bourhis

European Journal of Cancer, vol. 75, pp. 222-230, April 2017.


Purpose: In the context of locally advanced oropharyngeal cancer (LAOC) treated with definitive radiotherapy (RT) (combined with chemotherapy or cetuximab), the aims of this study were: (1) to identify PET-FDG parameters correlated with overall survival (OS) from a first cohort of patients; then (2) to compute a prognostic score; and (3) finally to validate this scoring system in a second independent cohort of patients.

Materials and methods: A total of 76 consecutive patients (training cohort from Rennes) treated with chemoradiotherapy or RT with cetuximab for LAOC were used to build a predictive model of locoregional control (LRC) and OS based on PET-FDG parameters. After internal calibration and validation of this model, a nomogram and a scoring system were developed and tested in a validation cohort of 46 consecutive patients treated with definitive RT for LAOC in Lausanne.

Results: In multivariate analysis, the metabolic tumour volume (MTV) of the primary tumour and the lymph nodes were independent predictive factors for LRC and OS. Internal calibration showed a very good adjustment between the predicted OS and the observed OS at 24 months. Using the predictive score, two risk groups were identified (median OS 42 versus 14 months, p < 0.001) and confirmed in the validation cohort from Lausanne (median OS not reached versus 26 months, p = 0.008).

@ARTICLE(http://bigwww.epfl.ch/publications/castelli1701.html,
AUTHOR="Castelli, J. and Depeursinge, A. and Ndoh, V. and Prior, J.O.
	and Ozsahin, M. and Devillers, A. and Bouchaab, H. and Chajon, E.
	and de Crevoisier, R. and Scher, N. and Jegoux, F. and Laguerre, B.
	and De Bari, B. and Bourhis, J.",
TITLE="A {PET}-Based Nomogram for Oropharyngeal Cancers",
JOURNAL="European Journal of Cancer",
YEAR="2017",
volume="75",
number="",
pages="222--230",
month="April",
note="")
© 2017 10.1016/j.ejca.2017.01.018. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from 10.1016/j.ejca.2017.01.018. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
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