Table 2.

Differences in median volume of the T2 hyperintensity (T2L), contrast enhancing (CE) lesion, and necrotic (NEC) lesion for tumors of various grades

Grade	Value	T2 lesion volume (cc)	NE lesion volume (cc)	CE lesion volume (cc)	NEC lesion volume (cc)	% (CEL + NEC) of T2 lesion
II	Median	42.3	38.3	0.5	–	0.0
	Range	0.6–257.2	0.6–252.2	0.2–5.8	–	0.0–9.5
	N	56	56	6	0	56
III	Median	39.9	38.8	0.9	–	0.6
	Range	6.9–139.8	5.9–139.8	0.2–17.3	–	0.0–32.7
	N	31	31	16	0	31
IV	Median	60.3	43.2	15.2	4.5	34.1
	Range	12.1–166.9	4.5–123.4	0.3–93.3	0.0–34.5	0.0–92.9
	N	56	56	55	49	56

Note that if the presence of necrosis were used as criteria for predicting grade then 49/56 grade IV lesions would be correctly distinguished from the grade II and grade III lesions