Presentation
Previous history of motor vehicle trauma
Patient Data
Age: 1 year
Gender: Female
From the case:
Leptomeningeal cyst
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Oval shape lucency with smooth margins at parietal bone is detected in scanogram.
A lytic calvarial lesion with scalloped edges at right parietal bone is visible with extracranial brain herniation. A large porencephalic cyst at right frontoparietal lobe is detected. Right sided unilateral ventricular dilatation is seen.
Based on previous history of trauma and above mentioned findings, leptomeningeal cyst or growing fracture should be considered.
Case Discussion
CT scan is the modality of choice for the evaluation of leptomeningeal cyst. It consists of a lytic calvarial lesion with scalloped edges, in which encephalomalacia invaginates. The following features may also be present 1,2:
- extracranial brain herniation
- hydrocephalus
- unilateral ventricular dilatation
- porencephalic cyst
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