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The parent refused to give the child IV contrast
A well defined solid lesion is seen occupying and expanding the 4th ventricle. It displays low signal in T1, bright signal in T2 and restricted diffusion in DWI. It shows cystic areas of degenertion inside and extension through the foramina of lushka. Associated supratentorial hydrocephalic changes and CSF transependymal permeation are noted.