Implications of identifying additional cerebral metastases during gamma knife radiosurgery Academic Article uri icon


MeSH Major

  • Antibodies, Monoclonal
  • Antineoplastic Agents
  • Brain Neoplasms
  • Melanoma
  • Radiosurgery


  • Introduction. Gamma Knife radiosurgery (GK-SRS) is commonly used to treat cerebral metastases. Although additional intracranial metastases are often found on the day of GK-SRS, the significance of finding them is unknown. Methods. A retrospective review of 133 patients undergoing GK-SRS for cerebral metastases was performed. The change in number of metastases detected between initial referral magnetic resonance imaging (MRI) and subsequent treatment MRI was quantified. Multivariate and Kaplan-Meier analyses were employed to examine the significance of identifying additional lesions. Results. Additional lesions were identified in 41% of patients. An increasing number of metastases on referral MRI (P = 0.001) and the presence of progressive systemic disease (P = 0.003) were predictive of identifying additional metastases. Median survival was 6.9 months for patients with additional metastases, compared to 12.1 months for patients without additional metastases (hazard ratio 1.56, P = 0.021). Conclusions. Identifying additional metastases on the day of GK-SRS may add important prognostic information.

publication date

  • September 18, 2012



  • Academic Article



  • eng

PubMed Central ID

  • PMC3265271

Digital Object Identifier (DOI)

  • 10.1155/2012/748284

PubMed ID

  • 22312543

Additional Document Info

start page

  • 748284


  • 2012