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Radiation Oncology
Published in: Radiation Oncology 1/2010

Open Access 01-12-2010 | Research

Large volume unresectable locally advanced non-small cell lung cancer: acute toxicity and initial outcome results with rapid arc

Authors: Marta Scorsetti, Pierina Navarria, Pietro Mancosu, Filippo Alongi, Simona Castiglioni, Raffaele Cavina, Luca Cozzi, Antonella Fogliata, Sara Pentimalli, Angelo Tozzi, Armando Santoro

Published in: Radiation Oncology | Issue 1/2010

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Abstract

Background

To report acute toxicity, initial outcome results and planning therapeutic parameters in radiation treatment of advanced lung cancer (stage III) with volumetric modulated arcs using RapidArc (RA).

Methods

Twenty-four consecutive patients were treated with RA. All showed locally advanced non-small cell lung cancer with stage IIIA-IIIB and with large volumes (GTV:299 ± 175 cm3, PTV:818 ± 206 cm3). Dose prescription was 66Gy in 33 fractions to mean PTV. Delivery was performed with two partial arcs with a 6 MV photon beam.

Results

From a dosimetric point of view, RA allowed us to respect most planning objectives on target volumes and organs at risk. In particular: for GTV D1% = 105.6 ± 1.7%, D99% = 96.7 ± 1.8%, D5%-D95% = 6.3 ± 1.4%; contra-lateral lung mean dose resulted in 13.7 ± 3.9Gy, for spinal cord D1% = 39.5 ± 4.0Gy, for heart V45Gy = 9.0 ± 7.0Gy, for esophagus D1% = 67.4 ± 2.2Gy. Delivery time was 133 ± 7s. At three months partial remission > 50% was observed in 56% of patients. Acute toxicities at 3 months showed 91% with grade 1 and 9% with grade 2 esophageal toxicity; 18% presented grade 1 and 9% with grade 2 pneumonia; no grade 3 acute toxicity was observed. The short follow-up does not allow assessment of local control and progression free survival.

Conclusions

RA proved to be a safe and advantageous treatment modality for NSCLC with large volumes. Long term observation of patients is needed to assess outcome and late toxicity.
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Metadata
Title
Large volume unresectable locally advanced non-small cell lung cancer: acute toxicity and initial outcome results with rapid arc
Authors
Marta Scorsetti
Pierina Navarria
Pietro Mancosu
Filippo Alongi
Simona Castiglioni
Raffaele Cavina
Luca Cozzi
Antonella Fogliata
Sara Pentimalli
Angelo Tozzi
Armando Santoro
Publication date
01-12-2010
Publisher
BioMed Central
Published in
Radiation Oncology / Issue 1/2010
Electronic ISSN: 1748-717X
DOI
https://doi.org/10.1186/1748-717X-5-94

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