CyberKnife radiosurgery for brainstem metastases: Management and outcomes and a review of the literature

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia
Szu-Hao LiuSteven D Chang

Abstract

To our knowledge this paper is the first to use recursive partitioning analysis (RPA) for brainstem metastasis (BSM) patient outcomes, after CyberKnife radiosurgery (CKRS; Accuray, Sunnyvale, CA, USA); nine similar previous publications used mainly Gamma Knife radiosurgery (Elekta AB, Stockholm, Sweden). Retrospective chart reviews from 2006-2013 of 949 CKRS-treated brain metastasis patients showed 54 BSM patients (5.7%): 35 RPA Class II (65%) and 19 Class III (35%). There were 30 women (56%) and 24 men (44%). The median age was 59 years (range 36-80) and median follow-up was 5 months (range 1-52). Twenty-three patients (43%) had lung carcinoma BSM and 12 (22%) had breast cancer BSM. Fifty-four RPA Class II and III BSM patients had a median overall survival (OS) of 5 months, and for each Class 8 and 2 months, respectively. Of 36 RPA Class II and III patients with available symptoms (n=31) and findings (n=33), improvement/stability occurred in the majority for symptoms (86%) and findings (92%). Of 35 cases, 28 (80%) achieved BSM local control (LC); 13/14 with breast histology (93%) and 10/13 with lung histology (77%). All six RPA Class II and III patients with controlled extracranial systemic disease (ESD) experienced LC. Median...Continue Reading

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Citations

Nov 11, 2020·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·Laura-Nanna LohkampUNKNOWN Pediatric CyberKnife© Registry Study Group
Jul 31, 2021·Acta Ophthalmologica·Vincenzo StaraceGiulio Modorati

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