1.

预后分级评估

Graded prognostic assessment

Clinical feature	Score
	0	0.5	1.0
KPS: Karnofsky performance status; CNS: central nervous system.
No. of CNS metastases	> 3	2-3	1
KPS	< 70	70-80	90-100
Age	> 60	50-59	< 50
Extracranial metastases	Present	-	None