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Multicenter Study
. 2019 Feb 11;14(1):32.
doi: 10.1186/s13014-019-1235-y.

3-weekly or weekly cisplatin concurrently with radiotherapy for patients with squamous cell carcinoma of the head and neck - a multicentre, retrospective analysis

Affiliations
Multicenter Study

3-weekly or weekly cisplatin concurrently with radiotherapy for patients with squamous cell carcinoma of the head and neck - a multicentre, retrospective analysis

Seth Helfenstein et al. Radiat Oncol. .

Abstract

Background: Concurrent chemoradiotherapy with cisplatin is standard for patients (pts) with loco-regionally advanced squamous cell carcinoma of the head and neck (LA-SCCHN) and for patients with resected SCCHN with high-risk features. The standard regimen includes 3-weekly cisplatin, but weekly regimens are often used to lower toxicity. Reaching a cumulative dose of ≥200 mg/m2 cisplatin was shown being associated with improved outcome. We herein investigated cumulative dose reached and toxicities between the 3-weekly and weekly cisplatin regimens with concurrent radiotherapy.

Methods: Multicentre, retrospective analysis of all patients undergoing combined RCT with cisplatin treated at 3 centres in Switzerland between 06/2008 and 12/2015.

Results: Three hundred fourteen pts. were included (3-weekly, N = 127; weekly, N = 187). Median cumulative cisplatin dose was 200 mg/m2 (IQR 150-300) for pts. treated with a 3-weekly schedule and 160 mg/m2 (120-240) for the weekly schedule, consequently more pts. treated with a 3-weekly schedule reached a cumulative dose ≥200 mg/m2 (75.6% vs. 47.1%, p < 0.001). This association was also observed in multivariable analysis adjusted for age and sex (OR 3.46, 95% confidence interval [CI], 2.1-5.7). The 3-weekly regimen led to a higher rate of acute renal toxicity (33.1% vs. 20.9%, p = 0.022). In the landmark analysis, we could not confirm that a cisplatin dose ≥200 mg/m2 is associated with better survival (HR 1.3, 95% CI 0.8-1.9).

Conclusions: Significantly more patients receive a cumulative cisplatin dose of ≥200 mg/m2, when treated with a 3-weekly schedule compared to weekly dosing. The previously reported association between a cumulative cisplatin dose ≥200 mg/m2 and improved outcome could not be shown in our study.

Keywords: Chemo-radiotherapy; Cisplatin; Dose; Head and neck squamous carcinoma; Treatment.

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Conflict of interest statement

Ethics approval and consent to participate

This study was performed in accordance with institutional review board approval by the local ethical committees (ethical committee of northwestern and central part of Switzerland, (EKNZ) and cantonal ethical committee Zurich (KEK), approval number 2016–01062).

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Cumulative cisplatin dose with a cut-off dose of 200 mg/m2 comparing 3-weekly vs. weekly schedule
Fig. 2
Fig. 2
Comparison of treatment regimens (3-weely vs. weekly cisplatin) for progression-free survival (landmark analysis)
Fig. 3
Fig. 3
Comparison of treatment regimens (3-weely vs. weekly cisplatin) for overall survival (landmark analysis)

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