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- W2912598453 abstract "<b><i>Background:</i></b> Significant heterogeneity exists in target volumes for postoperative stereotactic radiosurgery (SRS) for brain metastases. A set of contouring guidelines was recently published, and we investigated the impact of deviations. <b><i>Methods:</i></b> Patients (<i>n</i> = 41) undergoing single-fraction Gamma Knife SRS following surgical resection of brain metastases from 2011 to 2017 were retrospectively reviewed. SRS included the entire contrast-enhancing cavity with heterogeneity in inclusion of the surgical tract and no routine margin along the dura or clinical target volume margin. Follow-up MR imaging was fused with SRS plans to assess patterns of failure. <b><i>Results:</i></b> The median follow-up was 11.1 months with a median prescription of 18 Gy. There were 5 local failures: infield (<i>n</i> = 3, 60%), surgical tract (<i>n</i> = 1, 20%), and marginal > 5 mm from the resection cavity (<i>n</i> = 1, 20%). No marginal failures < 5 mm or dural margin failures were noted. For deep lesions (<i>n</i> = 13), 62% (<i>n</i> = 8) had the entire tract covered. The only tract recurrence was in a deep lesion without coverage of the surgical tract (<i>n</i> = 1/5). <b><i>Conclusion:</i></b> In this small preliminary experience, despite no routine inclusion of the dural tract or bone flap, no failures were noted in these locations. Omission of the surgical tract in deep lesions may increase failure rates." @default.
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- W2912598453 date "2019-01-01" @default.
- W2912598453 modified "2023-10-14" @default.
- W2912598453 title "Tumor Cavity Recurrence after Stereotactic Radiosurgery of Surgically Resected Brain Metastases: Implication of Deviations from Contouring Guidelines" @default.
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- W2912598453 doi "https://doi.org/10.1159/000496156" @default.
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