Table 1:

Overview of absolute and relative (%) frequencies of MR imaging features

	Available Data	No.	%
Sex	38
Male		14	36.8
Female		24	63.2
Histology	38
CMB		36	94.7
AMBa		1	2.6
LCMBa		1	2.6
Hydrocephalus	38
No		15	39.5
Slight		6	15.8
Moderate		15	39.5
Severe		2	5.3
Enhancement	38
No		0	0
Light		4	10.5
Moderate		12	31.6
Strong		22	57.9
Enhancing area	38
0%–25%		0	0
26%–50%		1	2.6
51%–75%		1	2.6
76%–100%		36	94.7
T2-weighted images	37
Homogeneous		6	16.2
Inhomogeneous		31	83.8
Hyperintense		4	10.8
Isointense		20	54.1
Hypointense		13	35.1
T1-weighted images	36
Homogeneous		15	41.7
Inhomogeneous		21	58.3
Hyperintense		1	2.8
Isointense		8	22.2
Hypointense		27	75
Cysts	38
No		20	52.6
As bright as the CSF		3	7.9
Brighter than the CSF		5	13.2
Blood-fluid level		10	26.3
Blood-degradation products on T1WI, T2WI or T2*/SWI	38
Yes		23	60.5
No		15	39.5
Mass of iron contents on T2*/SWI	18
No		2	11.1
<50%		11	61.1
>50%		5	27.8
Dissemination	35
No		31	88.6
M2		1	2.9
M3		1	2.9
M2 + 3		2	5.7

Note:—AMB indicates anaplastic medulloblastoma according to the WHO classification of 2007.

^aAccording to the WHO classification of 2007.