Medulloblastoma with obstructive hydrocephalus

Case contributed by Dr Ahmed Abd Rabou

Presentation

Headache and blurring of vision

Patient Data

Age: 4 years old
Gender: Male

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.

Case Discussion

Although the parents did not consent to IV contrast, DWI helped us to characterize this lesion. 4th ventricular tumours include ependymoma, subependymoma, medulloblastoma and choroid plexus papilloma. The only lesion which may show diffusion restriction is medulloblastoma because it has packed cells (highly cellular tumour).

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Case information

rID: 22688
Case created: 16th Apr 2013
Last edited: 31st Mar 2016
Inclusion in quiz mode: Included

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