Abstract | PURPOSE: Both laser interstitial thermal therapy (LITT) and bevacizumab have been used successfully to treat radiation necrosis (RN) after radiation for brain metastases. Our purpose is to compare pre-treatment patient characteristics and outcomes between the two treatment options. METHODS: Single-institution retrospective chart review identified brain metastasis patients who developed RN between 2011 and 2018. Pre-treatment factors and treatment responses were compared between those treated with LITT versus bevacizumab. RESULTS: Twenty-five patients underwent LITT and 13 patients were treated with bevacizumab. The LITT cohort had a longer overall survival (median 24.8 vs. 15.2 months for bevacizumab, p = 0.003) and trended to have a longer time to local recurrence (median 12.1 months vs. 2.0 for bevacizumab), although the latter failed to achieve statistical significance (p = 0.091). LITT resulted in an initial increase in lesional volume compared to bevacizumab (p < 0.001). However, this trend reversed in the long term follow-up, with LITT resulting in a median volume decrease at 1 year post-treatment of - 64.7% (range - 96.0% to + > 100%), while bevacizumab patients saw a median volume increase of + > 100% (range - 63.0% to + > 100%), p = 0.010. CONCLUSIONS: Our study suggests that patients undergoing LITT for RN have longer overall survival and better long-term lesional volume reduction than those treated with bevacizumab. However, it remains unclear whether our findings are due only to a difference in efficacy of the treatments or the implications of selection bias.
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Authors | Nanthiya Sujijantarat, Christopher S Hong, Kent A Owusu, Aladine A Elsamadicy, Joseph P Antonios, Andrew B Koo, Joachim M Baehring, Veronica L Chiang |
Journal | Journal of neuro-oncology
(J Neurooncol)
Vol. 148
Issue 3
Pg. 641-649
(Jul 2020)
ISSN: 1573-7373 [Electronic] United States |
PMID | 32602021
(Publication Type: Clinical Trial, Comparative Study, Journal Article)
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Chemical References |
- Antineoplastic Agents, Immunological
- Bevacizumab
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Antineoplastic Agents, Immunological
(therapeutic use)
- Bevacizumab
(therapeutic use)
- Brain Neoplasms
(pathology, surgery)
- Female
- Follow-Up Studies
- Humans
- Laser Therapy
(methods)
- Male
- Middle Aged
- Necrosis
- Prognosis
- Radiation Injuries
(drug therapy, etiology, pathology, surgery)
- Radiosurgery
(adverse effects)
- Retrospective Studies
- Survival Rate
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