Positive (LC): KPS ≥70, no prior WBRT, smaller total tumor volume
Positive (DCC): controlled extracranial disease, lower number of metastases at the time of SRS, absence of lung metastasesPositive (OS): controlled extracranial disease, KPS score ≥70, smaller total tumor volume, absence of brainstem metastases, Her2+. Here, ERBB2 is linked to neoplasm.