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01-03-2018 | Original Paper

Hypofractionated postmastectomy radiotherapy with helical tomotherapy in patients with immediate breast reconstruction: dosimetric results and acute/intermediate toxicity evaluation

Authors: Roberto Orecchia, Damaris Patricia Rojas, Federica Cattani, Rosalinda Ricotti, Luigi Santoro, Anna Morra, Raffaella Cambria, Rosa Luraschi, Samantha Dicuonzo, Sara Ronchi, Alessia Surgo, Veronica Dell’ Acqua, Paolo Veronesi, Francesca De Lorenzi, Cristiana Fodor, Maria Cristina Leonardi, Barbara Alicja Jereczek-Fossa

Published in: Medical Oncology | Issue 3/2018

Abstract

The aim of this study was to evaluate the dosimetry and toxicity of hypofractionation in postmastectomy radiotherapy (PMRT) with intensity-modulated radiotherapy (IMRT) in breast cancer (BC) patients. Stage II–III BC patients with implant-based immediate breast reconstruction received PMRT to the chest wall (CW) and to the infra/supraclavicular nodal region (NR) using a 15-fraction schedule (2.67 Gy/fraction) and helical IMRT (Tomotherapy^® System, Accuray Incorporated, Sunnyvale, CA). A score was assigned to each treatment plan in terms of planning target volume (PTV) coverage of CW and NR and the sparing of the organs at risk (OARs). The total score for each plan was calculated. Toxicity was prospectively assessed according to validated scales. Data from 120 consecutive patients treated in the period 2012–2015 were analysed with a median follow-up from the end of radiotherapy of 13.2 months (range 0.0–35 months). 70.8% (85/120) of the plans had high total scores as a result of an optimal coverage of both CW and RN and optimal sparing of all OARs. The maximum acute toxicity was of grade 2 in 36.7% of the cases. Early late toxicity was mild in the majority of cases. In the study population, helical tomotherapy-based IMRT produced optimal treatment plans in most cases. Acute and late toxicity was mild/moderate. Hypofractionated helical IMRT appears to be safe and feasible in the moderate term for PMRT.

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Title: Hypofractionated postmastectomy radiotherapy with helical tomotherapy in patients with immediate breast reconstruction: dosimetric results and acute/intermediate toxicity evaluation
Authors: Roberto Orecchia
Damaris Patricia Rojas
Federica Cattani
Rosalinda Ricotti
Luigi Santoro
Anna Morra
Raffaella Cambria
Rosa Luraschi
Samantha Dicuonzo
Sara Ronchi
Alessia Surgo
Veronica Dell’ Acqua
Paolo Veronesi
Francesca De Lorenzi
Cristiana Fodor
Maria Cristina Leonardi
Barbara Alicja Jereczek-Fossa
Publication date: 01-03-2018
Publisher: Springer US
Published in: Medical Oncology / Issue 3/2018
Print ISSN: 1357-0560
Electronic ISSN: 1559-131X
DOI: https://doi.org/10.1007/s12032-018-1095-6

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