Validity of a Recently-Proposed Prognostic Grading Index, Brain Metastasis Velocity, for Brain Metastasis Patients Undergoing Multiple Radiosurgical Procedures

To our knowledge, this is the first analysis to validate the clinical significance of the Brain Metastasis Velocity score based on a large patient series, i.e., more than 1000 patients in whom multiple gamma knife stereotactic radiosurgery (SRS) procedures were performed. Furthermore, we assessed the feasibility of applying this grading index not only after the second SRS but also after the third or fourth SRS to predict the survival periods of our patients.

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