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Subgroup features
•
WNT
:
occur mainly along the CP/CPA axis
- good prognosis
•
SHH
:
>50% cerebellar hemispheric
- intermediate prognosis
•
GP 3
:
primarily midline/juxtaventricular, enhancement +/++
- poor prognosis, early dissemination
•
Gp 4
:
midline/4
th
ventricle based, enhancement 0/+
- dissemination common