Table 1.

Patient characteristics

Gender
Male	54 (42%)
Female	75 (58%)
Extracranial tumor activity
Yes	39
No	90
Diagnosis of brain metastases within 30 days after diagnosis of primary tumor
Yes	39
No	90
Prior brain treatment
Yes	23
No	106
Prior SRS
Yes	15
No	114
Prior WBRT
Yes	7
No	122
Prior surgery
Yes	8
No	121
Prior systemic treatment
Yes	76
No	53
Presence of extracranial metastases
Yes	54
No	75
Presence of lymph node metastases
Yes	68
No	61
Presence of seizure
Yes	18
No	111
KPS score
60	3
70	14
80	31
90	38
100	43
Occurrence of new metastases after GKRS
Yes	62
No	67
Presence of local recurrence
Yes	40
No	89
Total tumor volume (mm3)
Average	17,445 (88–88,029 mm3)
Treatment dose (Gy)
Average (minimum–maximum)	22 (18–25)
Age at diagnosis of brain metastases (years)
Average (minimum–maximum)	63 (36–85)
Primary tumor type
Lung	89
Melanoma	8
Breast	3
Others	29
Number of brain metastases
1	30
2–3	50
4–10	41
> 10	8