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. 2015 May 27;10:118. doi: 10.1186/s13014-015-0421-9

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© Liu et al. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Impact of the timing of brain RT on overall survival (p = 0.246, n = 96): 39 patients were treated initially with brain radiotherapy (first-line RT), and 23 patients were administered RT when they exhibited brain disease progression (delayed RT). Thirty-four patients did not receive radiotherapy and remained asymptomatic until the last follow-up (no brain RT). Univariate analysis revealed that the timing of brain RT was not significantly related to OS (p = 0.246)