Ependymoma (posterior third ventricle)

Case contributed by Dr Jeremy Jones


Headache and altered gaze.

Patient Data

Age: 7
Gender: Female

A large well defined mass with restricted diffusion, but limited contrast enhancement centered in the pineal region. It results in obstructive hydrocephalus, clearly of some duration (as the ventricles are very large) but also with transependymal edema. 

Annotated image


The patient went to theatre for excision of the mass.

Histology confirmed the mass to be an ependymoma.

Case Discussion

This is a case of a common pediatric tumor being found in an uncommon location.  In pediatric populations, ependymomas are usually found in the posterior fossa.  And, they are not usually amongst the differential of a pineal region mass

However, the mass does abut the posterior portion of the third ventricle and it is its location within the 3rd ventricle and its subsequent expansion of the ventricle and obstruction of the aqueduct that should aid diagnosis.

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Case information

rID: 21898
Published: 24th Feb 2013
Last edited: 16th Jul 2018
Tag: pineal
Inclusion in quiz mode: Included

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