Table 4:

MR imaging features by tumor group after excluding pineoblastomas (n = 29)

	Group				P Value
	ET		Non-ET			All Patients
	No.	%	No.	%		No.	%
Size (cm)					.95
Median	5.7	–	6.2	–		6.1	–
Minimum	3.6	–	2.7	–		2.7	–
Maximum	9.1	–	9.3	–		9.3	–
% Enhancement					.68a
None	0	0	0	0		0	0
0–25	2	20	3	15.8	5	17.2
25–75	5	50	7	36.8	12	41.4
>75	3	30	9	47.4	12	41.4
Margins					.068
Well-defined	10	100.0	13	68.4		23	79.3
Ill-defined	0	0	6	31.6	6	20.7
Presence of edema					.24b
Absent	5	50	5	26.3		10	34.5
<2 cm from tumor margin	4	40	13	68.4	17	58.6
>2 cm from tumor margin	1	10	1	5.3	2	6.9
Presence of cyst/necrosis					.53
Absent	0	0	3	15.8		3	10.3
Present	10	100	16	84.2	26	89.7
Presence of calcification or hemorrhage					.11
Absent	6	60	5	26.3		11	37.9
Present	4	40	14	73.7	18	62.1
DWI					–
Bright	9	90	15	78.9		24	82.8
Dark	0	0	0	0	0	0
Intermediate	0	0	3	15.8	3	10.3
Artifact or not available	1	10	1	5.3	2	6.9
Metastasis
Intracranial	0	0	0	0		0	0
Spinal	0	0	0	0		0	0
Intracranial and spinal	0	0	0	0		0	0
None	10	100	19	100.0		29	100
All patients	10	100.0	19	100.0		29	100.0

Note:— – indicates no data available.

^aComparison of none versus 0%–25% versus 25%–75% versus >75%.

^bComparison of absent versus present.