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Pilocytic astrocytoma

Case contributed by: Dr Frank Gaillard

Presentation:

Headaches

Patient Data:

Age: 12 years
Gender: Male

MRI brain

Modality: MRI

Selected images from an MRI of the posterior fossa demonstrates a cystic mass with peripheral nodular enhancement. It arises form the right cerebellar hemisphere, displacing and compressing the fourth ventricle. It is surrounded by vasogenic oedema. No flow voids are noted. 

Case Discussion:

A cystic mass with mural enhancement in a child arising from the cerebellar hemisphere is usually a pilocytic astrocytoma. This patient went on to have a craniotomy and resection which confirmed the diagnosis. 

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