Table 2. Tumor Volume.

	Subcategory	Median	Range	Small	Large	HR	SE	p-value
Number				21	21
Age
	<50			6(29%)	2(10%)
	>50			15(71%)	19(90%)	0.009	0.51	NS
	Median			54	61
Resection Status
	GTR			11(52%)	3(15%)	0.66	0.88	NS
	STR			6(29%)	13(62%)	0.55	0.82	NS
	Biopsy			4(20%)	5(24%)
Location
	Non-periventricular			16(84%)	9(45%)
	Periventricular			3(16%)	11(55%)	0.23	0.60	NS
Treatment Planning Volumes
	GTV1	90.4 cc	2.7–385 cc			1.44	0.63	0.022
	GTV2	28.4 cc	1.6–166 cc
	PTV1	424.7 cc	76–1124 cc
	PTV2	340 cc	79–859 cc

Abbreviations: GTR, gross total resection; STR, sub-total resection; GTV, gross tumor volume; PTV, planning tumor volume.