Long-Term Survivorship Following Stereotactic Radiosurgery Alone for Brain Metastases: Risk of Intracranial Failure and Implications for Surveillance and Counseling
Emile Gogineni, John A. Vargo, Scott M. Glaser, John C. Flickinger, Steven A. Burton, Johnathan A. Engh, Nduka M. Amankulor, Sushil Beriwal, Anette E. Quinn, Cihat Ozhasoglu, …
Clinical Neurology Life Sciences & Biomedicine Neurosciences & Neurology Science & Technology Surgery
BACKGROUND: Historically, survival for even highly select cohorts of brain metastasis patients selected for SRS alone is <2 yr; thus, limited literature on risks of recurrence exists beyond 2 yr.
OBJECTIVE: To investigate the possibility that for subsets of patients the risk of intracranial failure beyond 2 yr is less than the commonly quoted 50% to 60%, wherein less frequent screening may be appropriate.
METHODS: As a part of our institutional radiosurgery database, we identified 132 patients treated initially with stereotactic radiosurgery (SRS) alone (+/- pre-SRS surgical resection) with at least 2 yr of survival and follow-up from SRS. Primary study endpoints were rates of actuarial intracranial progression beyond 2 yr, calculated using the Kaplan-Meier and Cox regression methods.
RESULTS: The median follow-up from the first course of SRS was 3.5 yr. Significant predictors of intracranial failure beyond 2 yr included intracranial failure before 2 yr (52% vs 25%, P < .01) and total SRS tumor volume >= 5 cc (51% vs 25%, P < .01). On parsimonious multivariate analysis, failure before 2 yr (HR = 2.2, 95% CI: 1.2-4.3, P = .01) and total SRS tumor volume >= 5 cc (HR = 2.3, 95% CI: 1.2-4.3, P = .01) remained significant predictors of intracranial relapse beyond 2 yr.
CONCLUSION: Relapse rates beyond 2 yr following SRS alone for brain metastases are low in patients who do not suffer intracranial relapse within the first 2 yr and with low-volume brain metastases, supporting a practice of less frequent screening beyond 2 yr. For remaining patients, frequent (every 3-4 mo) screening remains prudent, as the risk of intracranial failure after 2 yr remains high.
Long-Term Survivorship Following Stereotactic Radiosurgery Alone for Brain Metastases: Risk of Intracranial Failure and Implications for Surveillance and Counseling
Creators
Emile Gogineni - UPMC Hillman Cancer Center
John A. Vargo - UPMC Hillman Cancer Center
Scott M. Glaser - UPMC Hillman Cancer Center
John C. Flickinger - UPMC Hillman Cancer Center
Steven A. Burton - UPMC Hillman Cancer Center
Johnathan A. Engh - UPMC Hillman Cancer Center
Nduka M. Amankulor - University of Pittsburgh
Sushil Beriwal - UPMC Hillman Cancer Center
Anette E. Quinn - UPMC Hillman Cancer Center
Cihat Ozhasoglu - UPMC Hillman Cancer Center
Dwight E. Heron - UPMC Hillman Cancer Center
Publication Details
Neurosurgery, v 83(2), pp 203-209
Publisher
Oxford Univ Press
Number of pages
7
Grant note
U54 GM104942 / NIGMS NIH HHS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of General Medical Sciences (NIGMS)
Resource Type
Journal article
Language
English
Academic Unit
Radiation Oncology (and Nuclear Medicine)
Web of Science ID
WOS:000454358800020
Scopus ID
2-s2.0-85063624218
Other Identifier
991021897278904721
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