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Published in: Strahlentherapie und Onkologie 1/2020

01-01-2020 | Glioma | Original Article

Bevacizumab as a treatment option for radiation necrosis after cranial radiation therapy: a retrospective monocentric analysis

Authors: Dr. med. R. Bodensohn, Dr. med. I. Hadi, Dr. med. D. F. Fleischmann, PD Dr. med. Dr. med. univ. S. Corradini, PD Dr. med. N. Thon, Dr. med. J. Rauch, Prof. Dr. med. C. Belka, Prof. Dr. med. Dipl.-Phys. M. Niyazi

Published in: Strahlentherapie und Onkologie | Issue 1/2020

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Abstract

Background and purpose

Radiation necrosis is a possible adverse event after cranial radiation therapy and can cause severe symptoms, such as an increased intracranial pressure or neurological deterioration. The vascular endothelial growth factor (VEGF) inhibitor bevacizumab (BEV) has been shown to be a feasible therapeutic option for symptomatic radiation necrosis, either when traditional antiedematous steroid treatment fails, or as an alternative to steroid treatment. However, to the best of our knowledge, only one randomized study with a rather small cohort exists to prove a beneficial effect in this setting. Therefore, further real-life data are needed. This retrospective monocentric case study evaluates patients who received BEV due to radiation necrosis, with a specific focus on the respective clinical course.

Methods

Using the internal database for pharmaceutical products, all patients who received BEV in our department were identified. Only patients who received BEV as symptomatic treatment for radiation necrosis were included. Patient characteristics, symptoms before, during, and after treatment, and the use of dexamethasone were evaluated using medical reports and systematic internal documentation. The symptoms were graded using CTCAE version 5.0 for general neurological symptoms. Symptoms were graded directly before each cycle and after the treatment (approximately 6 weeks). Additionally, the daily steroid dose was collected at these timepoints. Patients who either improved in symptoms, received less dexamethasone after treatment, or both were considered to have a benefit from the treatment.

Results

Twenty-one patients who received BEV due to radiation necrosis were identified. For 10 patients (47.6%) symptoms improved and 11 patients (52.4%) remained clinically stable during the treatment. In 14 patients (66.7%) the dexamethasone dose could be reduced during therapy, 5 patients (23.8%) received the same dose of dexamethasone before and after the treatment, and 2 patients (9.5%) received a higher dose at the end of the treatment. According to this analysis, overall, 19 patients (90.5%) benefited from the treatment with BEV. No severe adverse effects were reported.

Conclusion

BEV might be an effective and safe therapeutic option for patients with radiation necrosis as a complication after cranial radiation therapy. Patients seem to benefit from this treatment by improving symptomatically or through reduction of dexamethasone.
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Metadata
Title
Bevacizumab as a treatment option for radiation necrosis after cranial radiation therapy: a retrospective monocentric analysis
Authors
Dr. med. R. Bodensohn
Dr. med. I. Hadi
Dr. med. D. F. Fleischmann
PD Dr. med. Dr. med. univ. S. Corradini
PD Dr. med. N. Thon
Dr. med. J. Rauch
Prof. Dr. med. C. Belka
Prof. Dr. med. Dipl.-Phys. M. Niyazi
Publication date
01-01-2020
Publisher
Springer Berlin Heidelberg
Published in
Strahlentherapie und Onkologie / Issue 1/2020
Print ISSN: 0179-7158
Electronic ISSN: 1439-099X
DOI
https://doi.org/10.1007/s00066-019-01521-x

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