Arachnoid cyst

Case contributed by Dr Prashant Gupta

Presentation

Progressively increasing head size.

Patient Data

Age: 2 years
Gender: Female
Modality: MRI

Large extra-axial cystic lesion in posterior fossa compressing cerebellum consistent with an arachnoid cyst

Case Discussion

Important points to look for (To differentiate from Dandy Walker-related posterior fossa cyst) :

  •  is the vermis well formed?
  • does the cyst communicate with 4th ventricle?
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Case Information

rID: 17261
Case created: 30th Mar 2012
Last edited: 15th Dec 2015
System: Head & Neck
Inclusion in quiz mode: Included

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