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. 2017 Jun 23;4:35. doi: 10.3389/fsurg.2017.00035

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Copyright © 2017 Vasudevan, Raleigh, Johnson, Garsa, Theodosopoulos, Aghi, Ames, McDermott, Barani and Braunstein.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Overall survival (OS) and local recurrence free survival in all patients. OS across all 20 patients shown relative to (A) time of fractionated stereotactic radiotherapy (FSRT) and (B) time of initial surgery or biopsy. Two deaths were reported during follow-up, the first 9 months after FSRT (11 months after surgery) for recurrent clival chordoma and the second 25 months after FSRT (59 months after surgery) in a patient with recurrent sacral chordoma. Local recurrence-free survival across all 20 patients shown relative to (C) time of FSRT and (D) time of initial surgery or biopsy revealed two local recurrences in the follow-up period. Median follow-up from time of FSRT was 28 months, and median follow-up from time of initial surgery/biopsy was 40 months.