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- W2319142000 abstract "Abstract Background Brainstem metastases (BSMs) represent a significant treatment challenge. Stereotactic radiosurgery (SRS) is often used to treat BSM. We report our experience in the treatment of BSM with Gamma Knife SRS (GK_SRS). Methods The records of 1962 patients with brain metastases treated with GK_SRS between 2009 and 2013 were retrospectively reviewed. Seventy-four patients with 77 BSMs and follow-up brain imaging were identified. Local control (LC), overall survival (OS), progression-free survival (PFS), and toxicity were assessed. Results Median follow-up was 5.5 months (range, 0.2–48.5 months). Median tumor volume was 0.13 cm3 (range, 0.003–5.58 cm3). Median treatment dose was 16 Gy (range, 10–20 Gy) prescribed to 50% isodose line (range, 40%–86%). Crude LC was 94% (72/77). Kaplan-Meier estimate of median OS was 8.5 months (95% CI, 5.6–9.4 months). Symptomatic lesions and larger lesions, especially size ≥2 cm3, were associated with worse LC (HR = 8.70, P = .05; HR = 14.55, P = .02; HR = 62.81, P < .001) and worse OS (HR = 2.00, P = .02; HR = 2.14, P = .03; HR = 2.81, P = .008). Thirty-six percent of BSMs were symptomatic, of which 36% (10/28) resolved after SRS and 50% (14/28) had stable or improved symptoms. Actuarial median PFS was 3.9 months (95% CI, 2.7–4.9 months). Midbrain location was significant for worse PFS (HR = 2.29, P = .03). Toxicity was low (8%, 6/74), with size and midbrain location associated with increased toxicity (HR 1.57, P = .05; HR = 5.25, P = .045). Conclusions GK_SRS is associated with high LC (94%) and low toxicity (8%) for BSMs. Presence of symptoms or lesion size ≥ 2 cm3 was predictive of worse LC and OS." @default.
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- W2319142000 date "2015-03-01" @default.
- W2319142000 modified "2023-10-14" @default.
- W2319142000 title "Gamma knife stereotactic radiosurgery in the treatment of brainstem metastases: The MD Anderson experience" @default.
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- W2319142000 doi "https://doi.org/10.1093/nop/npu032" @default.
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