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Published in: Neurological Research and Practice 1/2019

Open Access 01-12-2019 | Lymphoma | Research article

HDMTX-based induction therapy followed by consolidation with conventional systemic chemotherapy and intraventricular therapy (modified Bonn protocol) in primary CNS lymphoma: a monocentric retrospective analysis

Authors: Sabine Seidel, Agnieszka Korfel, Thomas Kowalski, Michelle Margold, Fatme Ismail, Roland Schroers, Alexander Baraniskin, Hendrik Pels, Peter Martus, Uwe Schlegel

Published in: Neurological Research and Practice | Issue 1/2019

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Abstract

Background

To evaluate outcome and toxicity of High-dose methotrexate (HDMTX)-based induction therapy followed by consolidation with conventional systemic chemotherapy and facultative intraventricular therapy (modified Bonn protocol) in patients with primary CNS lymphoma (PCNSL).

Methods

Between 01/2005 and 12/2013 113 patients with newly diagnosed PCNSL presented at our center; 98 of those qualified for HDMTX based chemotherapy, received a modified Bonn protocol and were included in the analysis. The treatment regimen was based on the “Bonn protocol”, but modified by omission of systemic drugs not able to cross the intact blood brain barrier. Intraventricular therapy was postponed until completion of three induction chemotherapy cycles or was replaced by intrathecal liposomal AraC and rituximab was added to induction from 2010 onwards.

Results

Median patient age was 67 years (range 38–83). Complete response/complete response unconfirmed (CR/CRu) was achieved in 59/98 patients (60%), partial response (PR) in 9/98 patients (9%). Twenty-four patients (23%) had progressive disease (PD), 6 (6%) died on therapy. Median progression-free survival (PFS) for all patients was 11.4 months, median overall survival (OS) 29.1 months. A trend to better outcome for intraventricular therapy versus intrathecal liposomal AraC was found in patients < 65 years (HR 0.53 [0.19–1.47] for OS and 0.46 [0.21–1.02] for PFS. Ommaya reservoir infection occurred in 3/33 patients (9%).

Conclusions

The data of this single center experience suggest that the outcome with a modified Bonn protocol was comparable to that of the previous regimen, showed fewer Ommaya reservoir infections and may have a trend for better outcome with intraventricular therapy.
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Metadata
Title
HDMTX-based induction therapy followed by consolidation with conventional systemic chemotherapy and intraventricular therapy (modified Bonn protocol) in primary CNS lymphoma: a monocentric retrospective analysis
Authors
Sabine Seidel
Agnieszka Korfel
Thomas Kowalski
Michelle Margold
Fatme Ismail
Roland Schroers
Alexander Baraniskin
Hendrik Pels
Peter Martus
Uwe Schlegel
Publication date
01-12-2019
Publisher
BioMed Central
Published in
Neurological Research and Practice / Issue 1/2019
Electronic ISSN: 2524-3489
DOI
https://doi.org/10.1186/s42466-019-0024-2

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