Colloid cyst of the 3rd ventricle

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

A VP shunt was inserted one year ago for obstructive hydrocephalus.

Patient Data

Age: 65 years
Gender: Female
This study is a stack
Axial
non-contrast
This study is a stack
Coronal
reconstruction
This study is a stack
Sagittal
reconstruction
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Info

A well-defined spontaneously hyperdense ovoid lesion is seen at the roof of the 3rd ventricle measuring (2.6 x 2 x 1.8 cm), obstructing the foramen of Monro bilaterally with moderate dilatation of the lateral ventricles (obstructive hydrocephalus).

The tip of the ventriculoperitoneal (VP) shunt is well-visualised at the occipital horn of the right lateral ventricle.

Case Discussion

MRI features of a colloid cyst of the 3rd ventricle causing an obstructive hydrocephalus.

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