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Published in: Strahlentherapie und Onkologie 3/2021

01-03-2021 | Radiotherapy | Original Article

Long-term outcomes and safety after reirradiation in locally recurrent nasopharyngeal carcinoma in a non-endemic area

Authors: J. Boustani, A. Ruffier, A. Moya-Plana, Y. Tao, F. Nguyen, C. Even, C. Berthold, O. Casiraghi, S. Temam, P. Blanchard

Published in: Strahlentherapie und Onkologie | Issue 3/2021

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Abstract

Purpose

To determine outcomes and toxicities after reirradiation for locally recurrent nasopharyngeal carcinoma (rNPC) and to apply a prognostic index in a non-endemic region.

Methods

We retrospectively reported progression-free survival (PFS), overall survival (OS), and treatment-related toxicities in patients treated with curative intent for locally rNPC. We applied the prognostic model for OS and grade 5 radiotherapy (RT)-related toxicities published by Li et al. and evaluated its prognostic accuracy by receiver operating characteristic (ROC) curve analysis.

Results

Between 2005 and 2018, 33 patients were treated for rNPC in our institution. Median follow-up was 60 months. The mean time to local recurrence was 75 months. Six (18%) patients had a persistent grade 3 toxicity from a previous RT course. The median re-RT dose was 66 Gy. After re-RT, 13 patients had local failure and 3 patients had metastatic recurrence. Median PFS was 18 months with a 5-year PFS rate of 29%. Median OS was 35 months with a 5-year OS rate of 37%. Grade 3 or higher toxicities rate was 74%. There were 21% grade 5 toxicities. The median time to a grade 5 toxicity was less than 6 months following re-RT. The prognostic nomogram was not predictive for OS or grade 5 toxicities.

Conclusion

Reirradiation of rNPC is an effective treatment but is associated with a high rate of life-threatening toxicity. Stratification of patients based on their risk of developing severe toxicity is needed to select patients who will most likely benefit from re-RT.
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Metadata
Title
Long-term outcomes and safety after reirradiation in locally recurrent nasopharyngeal carcinoma in a non-endemic area
Authors
J. Boustani
A. Ruffier
A. Moya-Plana
Y. Tao
F. Nguyen
C. Even
C. Berthold
O. Casiraghi
S. Temam
P. Blanchard
Publication date
01-03-2021
Publisher
Springer Berlin Heidelberg
Keyword
Radiotherapy
Published in
Strahlentherapie und Onkologie / Issue 3/2021
Print ISSN: 0179-7158
Electronic ISSN: 1439-099X
DOI
https://doi.org/10.1007/s00066-020-01647-3

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