Volume 42, Issue 2 pp. 244-253
ORIGINAL ARTICLE

Analysis of skin dose distribution for the prediction of severe radiation dermatitis in head and neck squamous cell carcinoma patients treated with concurrent chemo-radiotherapy

Pierluigi Bonomo MD

Corresponding Author

Pierluigi Bonomo MD

Radiation Oncology, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

Correspondence

Pierluigi Bonomo, MD., Radiation Oncology, Azienda Ospedaliero – Universitaria Careggi, University of Florence, largo Brambilla 3, 50134 Florence, Italy.

Email: [email protected]

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Cinzia Talamonti MS

Cinzia Talamonti MS

Medical Physics, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Isacco Desideri MD

Isacco Desideri MD

Radiation Oncology, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Livia Marrazzo MS

Livia Marrazzo MS

Medical Physics, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Donato Pezzulla MD

Donato Pezzulla MD

Radiation Oncology, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Andrea Rampini MD

Andrea Rampini MD

Radiation Oncology, Ospedale San Donato, Arezzo, Italy

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Silvia Bertocci MD

Silvia Bertocci MD

Radiation Oncology, Ospedale San Donato, Arezzo, Italy

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Roberta De Majo MD

Roberta De Majo MD

Radiation Oncology, Ospedale San Donato, Arezzo, Italy

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Chiara Gasperi MS

Chiara Gasperi MS

Medical Physics, Ospedale San Donato, Arezzo, Italy

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Assunta Simona Curion MS

Assunta Simona Curion MS

Medical Physics, Ospedale San Donato, Arezzo, Italy

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Luciana Lastrucci MD

Luciana Lastrucci MD

Radiation Oncology, Ospedale San Donato, Arezzo, Italy

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Luca Dominici MD

Luca Dominici MD

Radiation Oncology, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Stefania Pallotta MS

Stefania Pallotta MS

Medical Physics, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Lorenzo Livi MD

Lorenzo Livi MD

Radiation Oncology, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy

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Saverio Caini MD

Saverio Caini MD

Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention, and Clinical Network (ISPRO), Florence, Italy

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First published: 04 November 2019
Citations: 11
Section Editor: Athanassios Argiris

Abstract

Background

We investigated whether the pattern of intensity-modulated radiotherapy (IMRT) dose distribution to the skin can be correlated with the development of G3/G4 radiation dermatitis (RD).

Methods

A frequency-matched cohort analysis was perfomed on patients treated with IMRT and concurrent cisplatin or cetuximab. Risk ratios were obtained by fitting Poisson regression models.

Results

The incidence of G3/G4 RD was 41.1% in 90 patients included (50% vs 36.6% in the cetuximab and cisplatin cohorts, respectively). In multivariate analysis, PS ≥ 1 and weight loss at RT completion >10 kg were the only factors that retained significance. The best dosimetric predictive accuracy was provided by 19.9 cc and 5.8 cc of skin ring 2 mm V50 and V60, respectively (AUC: 0.61 for both).

Conclusion

Along with clinical factors, the pattern of dose distribution to a ring structure localized 2 mm below the patient's surface may help predict the development of severe RD.

CONFLICT OF INTEREST

The authors declare no potential conflict of interest.

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