Presentation
Headache.
Patient Data
Age: 50 years
Gender: Female
From the case:
Porencephalic cyst
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An intra-axial well-defined cystic lesion at the left temporoparietal region that strictly follows CSF in all basic sequences with free diffusion. It shows scalloping of the inner table of left parietal bone.
Case Discussion
Features are more suggestive of an intra-axial cyst, mostly porencephalic cyst. Features that suggest intra-axial location are:
- normal appearance of Sylvian fissure and nearby extra-axial space with no extrinsic mass effect upon the brain surface
- surrounding white matter and lateral ventricle wall around the inner surface of the lesion
- the outer wall, delineated by superficial cortical veins, looks continuous with brain surface
- it is not lined by a grey matter and is associated with a small amount of adjacent FLAIR hyperintensity
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