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Published in: Radiation Oncology 1/2012

Open Access 01-12-2012 | Research

Combination of peptide receptor radionuclide therapy with fractionated external beam radiotherapy for treatment of advanced symptomatic meningioma

Authors: Michael C Kreissl, Heribert Hänscheid, Mario Löhr, Frederik A Verburg, Markus Schiller, Michael Lassmann, Christoph Reiners, Samuel S Samnick, Andreas K Buck, Michael Flentje, Reinhart A Sweeney

Published in: Radiation Oncology | Issue 1/2012

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Abstract

Background

External beam radiotherapy (EBRT) is the treatment of choice for irresectable meningioma. Due to the strong expression of somatostatin receptors, peptide receptor radionuclide therapy (PRRT) has been used in advanced cases. We assessed the feasibility and tolerability of a combination of both treatment modalities in advanced symptomatic meningioma.

Methods

10 patients with irresectable meningioma were treated with PRRT (177Lu-DOTA0,Tyr3 octreotate or - DOTA0,Tyr3 octreotide) followed by external beam radiotherapy (EBRT). EBRT performed after PRRT was continued over 5–6 weeks in IMRT technique (median dose: 53.0 Gy). All patients were assessed morphologically and by positron emission tomography (PET) before therapy and were restaged after 3–6 months. Side effects were evaluated according to CTCAE 4.0.

Results

Median tumor dose achieved by PRRT was 7.2 Gy. During PRRT and EBRT, no side effects > CTCAE grade 2 were noted. All patients reported stabilization or improvement of tumor-associated symptoms, no morphologic tumor progression was observed in MR-imaging (median follow-up: 13.4 months). The median pre-therapeutic SUVmax in the meningiomas was 14.2 (range: 4.3–68.7). All patients with a second PET after combined PRRT + EBRT showed an increase in SUVmax (median: 37%; range: 15%–46%) to a median value of 23.7 (range: 8.0–119.0; 7 patients) while PET-estimated volume generally decreased to 81 ± 21% of the initial volume.

Conclusions

The combination of PRRT and EBRT is feasible and well tolerated. This approach represents an attractive strategy for the treatment of recurring or progressive symptomatic meningioma, which should be further evaluated.
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Metadata
Title
Combination of peptide receptor radionuclide therapy with fractionated external beam radiotherapy for treatment of advanced symptomatic meningioma
Authors
Michael C Kreissl
Heribert Hänscheid
Mario Löhr
Frederik A Verburg
Markus Schiller
Michael Lassmann
Christoph Reiners
Samuel S Samnick
Andreas K Buck
Michael Flentje
Reinhart A Sweeney
Publication date
01-12-2012
Publisher
BioMed Central
Published in
Radiation Oncology / Issue 1/2012
Electronic ISSN: 1748-717X
DOI
https://doi.org/10.1186/1748-717X-7-99

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