Stereotactic radiosurgery for brain metastases from malignant melanoma

Sebastian M Christ; Anand Mahadevan; Scott R Floyd; Fred C Lam; Clark C Chen; Eric T Wong; Ekkehard M Kasper

doi:10.4103/2152-7806.163315

Stereotactic radiosurgery for brain metastases from malignant melanoma

Surg Neurol Int. 2015 Aug 20;6(Suppl 12):S355-65. doi: 10.4103/2152-7806.163315. eCollection 2015.

Authors

Sebastian M Christ¹, Anand Mahadevan², Scott R Floyd³, Fred C Lam⁴, Clark C Chen⁵, Eric T Wong⁶, Ekkehard M Kasper¹

Affiliations

¹ Division of Neurosurgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 110 Francis Street, Boston, MA 02215, USA.
² Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave., Boston, MA 02215, USA.
³ Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave., Boston, MA 02215, USA ; Koch Institute for Integrative Cancer Biology, Massachusetts Institute of Technology, 500 Main Street, Cambridge, MA 02139, USA.
⁴ Koch Institute for Integrative Cancer Biology, Massachusetts Institute of Technology, 500 Main Street, Cambridge, MA 02139, USA.
⁵ Division of Neurosurgery, University of California Sand Diego, 200 West Arbor Drive, San Diego, CA 92103, USA.
⁶ Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave., Boston, MA 02215, USA.

Abstract

Background: Surgical resection and stereotactic radiosurgery (SRS) are well-established treatment methods for patients with brain metastases, yet their respective roles in the management of brain metastases remain incompletely defined.

Methods: To report on the role of SRS in the treatment of patients with brain metastases from malignant melanoma, a retrospective analysis of 381 intracranial melanoma metastases in 103 consecutive patients who underwent SRS between 2005 and 2011 at Beth Israel Deaconess Medical Center was conducted. The Cyberknife(®) SRS system was used to treat all patients. Clinical, technical, and radiographic data were recorded at presentation and on follow-up.

Results: The patient cohort consisted of 40 female (39%) and 63 male (61%) patients with a median age of 57 years. The median overall survival from the time of radiosurgery for the entire patient cohort was 7.6 months. The local control rate at 1-year was 72% for the patients who received surgery followed by SRS and 55% for the entire patient population. Surgery followed by SRS was associated with significantly improved overall survival compared with SRS alone or whole-brain radiation therapy followed by salvage SRS (P < 0.0057).

Conclusions: Both surgery plus SRS and SRS provide comparable local control. Despite the difference in lesion size in the subgroups who received surgery plus SRS and radiosurgery alone, similar outcomes were achieved in both groups, suggesting that surgical treatment of larger lesions can yield results that are not significantly different from small lesions treated by SRS alone.

Keywords: Brain metastasis; CyberKnife; melanoma; stereotactic radiosurgery.