Table 1.

Subject demographics

	Tumor types
	Total (N = 34)	Astrocytoma (N = 8)	Embryonal (N = 6)	Ependymoma (N = 10)	Glioneuronal/neuronal (N = 8)	Non-Tumor (N = 2)
Sex
F	14 (41 %)	3 (38%)	3 (50%)	5 (50%)	1 (12%)	2 (100%)
M	20 (59 %)	5 (62%)	3 (50%)	5 (50%)	7 (88%)	0 (0%)
Age (years)
Mean (SD)	8.5 (±5.3)	5.6 (±4.5)	9.2 (±5.4)	9.5 (±4.3)	10.5 (±6.5)	5.8 (±7.4)
Grade
High	12 (35 %)	0 (0%)	6 (100%)	5 (50%)	1 (12%)	0 (0%)
Low	18 (53 %)	8 (100%)	0 (0%)	4 (40%)	6 (75%)	0 (0%)
NEC/NOS	2 (6 %)	0 (0%)	0 (0%)	1 (10%)	1 (12%)	0 (0%)
Missing	2 (5.9%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	2 (100%)
Location
Metastasis	1 (3 %)	1 (12%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)
Subtentorial	19 (56 %)	5 (62%)	5 (83%)	8 (80%)	1 (12%)	0 (0%)
Supratentorial	14 (41 %)	2 (25%)	1 (17%)	2 (20%)	7 (88%)	2 (100%)