Survival following gamma knife radiosurgery for brain metastasis from breast cancer

Radiation Oncology

Table 1 Patient characteristics

Characteristics	No. of patients (n = 100)
Age at GKS, mean (sd), y	51.8 (10.2)
M0 at diagnosis	85
Breast Cancer Subtype
Luminal A	15
Luminal B	20
HER2	33
Basal	27
Unknown	5
KPS score
70–80	73
90–100	27
Extracranial metastasis at time of GKS	71
RTOG RPA Class 1	24
RTOG RPA Class 2	76
Prior WBRT	64
Number of Brain Metastasis Treated
1	48
2	21
3	17
4	10
> = 5	4
Intent of Radiosurgery
Boost after Surgery	9
Boost after WBRT	25
Sole Treatment	26
Salvage after Surgery	3
Salvage after WBRT	37
Volume of Largest Lesion, mean (sd), mL	3.86 (4)

Abbreviations: GKS Gamma Knife radiosurgery, ER estrogen receptor, H2N her-2/neu gene, KPS Karnofsky Performance Status, RPA Recursive partitioning analysis, RTOG Radiation therapy oncology group, WBRT Whole brain radiation therapy.

ISSN: 1748-717X