Case contributed by Dr Khairy Abdella



Patient Data

Age: 5 years
Gender: Female

A large posterior fossa solid mass that occupy and expand 4th ventricle showing the following features:

  • it measures about 4 x 3.2 x 4.7 cm in its various dimensions
  • hypointense signal at T1WI
  • heterogeneous bright signal at T2WI
  • showing cystic areas of degeneration
  • with restricted diffusion at DWI
  • bulging through foramen of Magendie
  • associated with moderate supratentorial hydrocephalus with periventricular CSF transependymal permeation
  • and surrounded by mild cerebellar edema

Case Discussion

Medulloblastoma is the most common brain tumor in childhood. It occurs mainly in the posterior fossa and associated with obstructive hydrocephalus. Differentiating medulloblastoma from posterior fossa ependymoma is one of the radiological challenges, especially in the pediatric age group.   

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Case information

rID: 39948
Case created: 29th Sep 2015
Last edited: 8th Jan 2017
Inclusion in quiz mode: Included

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