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Radiation Oncology
Published in: Radiation Oncology 1/2013

Open Access 01-12-2013 | Research

SBRT in unresectable advanced pancreatic cancer: preliminary results of a mono-institutional experience

Authors: Angelo Tozzi, Tiziana Comito, Filippo Alongi, Pierina Navarria, Cristina Iftode, Pietro Mancosu, Giacomo Reggiori, Elena Clerici, Lorenza Rimassa, Alessandro Zerbi, Antonella Fogliata, Luca Cozzi, Stefano Tomatis, Marta Scorsetti

Published in: Radiation Oncology | Issue 1/2013

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Abstract

Background

To assess the efficacy and safety of stereotactic body radiotherapy (SBRT) in patients with either unresectable locally advanced pancreatic adenocarcinoma or by locally recurrent disease after surgery.

Methods

Between January 2010 and October 2011, 30 patients with unresectable or recurrent pancreatic adenocarcinoma underwent exclusive SBRT. Twenty-one patients (70%) presented with unresectable locally advanced disease and 9 patients (30%) showed local recurrence after surgery. No patients had metastatic disease. Gemcitabine-based chemotherapy was administered to all patients before SBRT. Prescription dose was 45Gy in 6 daily fractions of 7.5Gy. SBRT was delivered using the volumetric modulated arc therapy (VMAT) by RapidArc. Primary end-point of this study was freedom from local progression (FFLP), secondary end-points were overall survival (OS), progression free survival (PFS) and toxicity.

Results

Median Clinical Target Volume (CTV) was 25.6 cm3 (3.2-78.8 cm3) and median Planning Target Volume (PTV) was 70.9 cm3 (20.4- 205.2 cm3). The prescription dose was delivered in 25 patients (83%), in 5 patients (17%) it was reduced to 36Gy in 6 fractions not to exceed the dose constraints of organs at risk (OARs). Median follow-up was 11 months (2–28 months). FFLP was 91% at 6 months, 85% at median follow-up and 77% at 1 and 2 years. For the group with prescription dose of 45Gy, FFLP was 96% at 1 and 2 years. The median PFS was 8 months. The OS was 47% at 1 year and median OS was 11 months. At the end of the follow-up, 9 patients (32%) were alive and 4 (14%) were free from progression. No patients experienced G ≥ 3 acute toxicity.

Conclusions

Our preliminary results show that SBRT can obtain a satisfactory local control rate for unresectable locally advanced and recurrent pancreatic adenocarcinoma. This fractionation schedule is feasible, and no G ≥ 3 toxicity was observed. SBRT is an effective emerging technique in the multi-modality treatment of locally advanced pancreatic tumors.
Appendix
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Metadata
Title
SBRT in unresectable advanced pancreatic cancer: preliminary results of a mono-institutional experience
Authors
Angelo Tozzi
Tiziana Comito
Filippo Alongi
Pierina Navarria
Cristina Iftode
Pietro Mancosu
Giacomo Reggiori
Elena Clerici
Lorenza Rimassa
Alessandro Zerbi
Antonella Fogliata
Luca Cozzi
Stefano Tomatis
Marta Scorsetti
Publication date
01-12-2013
Publisher
BioMed Central
Published in
Radiation Oncology / Issue 1/2013
Electronic ISSN: 1748-717X
DOI
https://doi.org/10.1186/1748-717X-8-148

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