Table 2. Patient characteristics.

	Pilocytic astrocytoma, WHO°I	Diffuse astrocytoma, WHO°II	Anaplastic astrocytoma, WHO°III	Glioblastoma, WHO°IV
male/female (n)	17/30	10/6	20/15	143/109
median age (range) in years	14.0 (0-75)	30.5 (5-52)	43 (22-66)	61 (7-80)
specimens (n)	47	16	35	252
tumor localization (supratentorial/infratentorial)	16/31	16/0	34/1	250/2
median follow-up (range) in months	31.0 (0.0-142.1)	52.9 (0.0-122.1)	12.1 (0.0-164.3)	11.3 (0.0-94.0)
mIDH1(R132H) (mut/wt)	0/46	8/6	19/16	10/242