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ORIGINAL ARTICLE
Year : 2012  |  Volume : 8  |  Issue : 2  |  Page : 215-221

Linear accelerator based stereotactic radiosurgery for melanoma brain metastases


1 Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
2 Neurological Surgery, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
3 Department of Medicine, Division of Medical Oncology, Melanoma Program, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
4 Department of Radiation Oncology and Neurological Surgery, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA

Correspondence Address:
Arlan H Mintz
Department of Neurological Surgery, University of Pittsburgh School of Medicine, 200 Lothrop Street, Suite 400, Pittsburgh, PA 15213
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0973-1482.98973

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Purpose: Melanoma is one of the most common malignancies to metastasize to the brain. Many patients with this disease will succumb to central nervous system (CNS) disease, highlighting the importance of effective local treatment of brain metastases for both palliation and survival of the disease. Our objective was to evaluate the outcomes associated with stereotactic radiosurgery (SRS) in the treatment of melanoma brain metastases. Materials and Methods: We retrospectively reviewed 54 patients with a total of 103 tumors treated with SRS. Twenty patients had prior surgical resection and nine patients underwent prior whole brain radiation therapy (WBRT). 71% of patients had active extracranial disease at the time of SRS. Median number of tumors treated with SRS was 1(range: 1-6) with median radiosurgery tumor volume 2.1 cm 3 (range: 0.05-59.7 cm 3 ). The median dose delivered to the 80% isodose line was 24 Gy in a single fraction. Results: The median follow-up from SRS was five months (range:1-30 months). Sixty-five percent of patients had a follow-up MRI available for review. Actuarial local control at six months and 12 months was 87 and 68%, respectively. Eighty-one percent of patients developed new distant brain metastases at a median time of two months. The six-month and 12-month actuarial overall survival rates were 50 and 25%, respectively. The only significant predictor of overall survival was surgical resection prior to SRS. Post-SRS bleeding occurred in 18% of patients and at a median interval of 1.5 months. There was only one episode of radiation necrosis with no other treatment-related toxicity. Conclusion: SRS for brain metastases from melanoma is safe and achieves acceptable local control.


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