Third ventricular pilocytic astrocytoma

Case contributed by Dr Jeremy Jones


Headaches for several months, with vomiting for 2 days and a seizure promoting review in the Emergency room.

Patient Data

Age: 10
Gender: Female

Centered on the 3rd ventricle is a mass lesion that is iso-intense to grey-matter on T1 weighted imaging and hyperintense on T2. There is not significant diffusion restriction, but there is avid peripheral enhancement that has a foliated pattern.

Case Discussion

The differential diagnosis for this lesion include the supratentorial counterparts of the commoner childhood intracranial tumours, e.g. supratentorial pilocytic astrocytoma and supratentorial ependymoma as well as supratentorial PNET.

Atypical teratorhabdoid tumours (ATRTs) may also have similar appearances although they are usually larger and don't sit within the ventricle.

Biopsy confirmed that this tumour was a supratentorial pilocytic astrocytoma and chemotherapy and radiotherapy were followed by surgical resection (which was near-complete).

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Case information

rID: 32201
Case created: 18th Nov 2014
Last edited: 2nd Jul 2017
Inclusion in quiz mode: Included

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