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Published in: Radiation Oncology 1/2018

Open Access 01-12-2018 | Research

Treatment outcomes of proton or carbon ion therapy for skull base chordoma: a retrospective study

Authors: Masaru Takagi, Yusuke Demizu, Fumiko Nagano, Kazuki Terashima, Osamu Fujii, Dongcun Jin, Masayuki Mima, Yasue Niwa, Kuniaki Katsui, Masaki Suga, Tomohiro Yamashita, Takashi Akagi, Koh-ichi Sakata, Nobukazu Fuwa, Tomoaki Okimoto

Published in: Radiation Oncology | Issue 1/2018

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Abstract

Background

The usefulness of particle therapy for skull base chordoma has not been established. The aim of this retrospective study was to analyse the treatment outcomes of proton therapy (PT) and carbon ion therapy (CIT) in patients with skull base chordoma at a single institution.

Methods

All patients who underwent PT or CIT with curative intent between 2003 and 2014 at Hyogo Ion Beam Medical Center were included in this study. Twenty-four patients were enrolled. Eleven (46%) received PT and 13 (54%) received CIT. Overall survival (OS), progression-free survival (PFS) and local control (LC) were calculated using the Kaplan–Meier method. Late toxicities were evaluated according to the Common Terminology Criteria for Adverse Events version 4.0.

Results

The median follow-up was 71.5 months (range, 14–175 months). The five-year LC, PFS and OS rates were 85, 81, and 86%, respectively. The LC (P = 0.048), PFS (P = 0.028) and OS (P = 0.012) were significantly improved in patients who had undergone surgery before particle therapy. No significant differences were observed in the LC rate and the incidence of grade 2 or higher late toxicities between patients who received PT and CIT.

Conclusions

Both PT and CIT appear to be effective and safe treatments and show potential to become the standard treatments for skull base chordoma. To increase the local control, surgery before particle therapy is preferable.
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Metadata
Title
Treatment outcomes of proton or carbon ion therapy for skull base chordoma: a retrospective study
Authors
Masaru Takagi
Yusuke Demizu
Fumiko Nagano
Kazuki Terashima
Osamu Fujii
Dongcun Jin
Masayuki Mima
Yasue Niwa
Kuniaki Katsui
Masaki Suga
Tomohiro Yamashita
Takashi Akagi
Koh-ichi Sakata
Nobukazu Fuwa
Tomoaki Okimoto
Publication date
01-12-2018
Publisher
BioMed Central
Published in
Radiation Oncology / Issue 1/2018
Electronic ISSN: 1748-717X
DOI
https://doi.org/10.1186/s13014-018-1173-0

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