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.