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Growing fracture/Leptomeningeal
Cyst• Rare
– <1% of skull fractures
• Pathophys– Dural deal with herniation of pia and
arachnoid through tear– CSF pulsations lead to erosion of bone– Diastasis of fracture over time
Growing fracture/Leptomeningeal
Cyst• Imaging
– Angular, linear lytic lesion– Scalloped margins
• Management– f/u with neurosurgery– Early intervention as needed
Case 8
• Persistent skull defect
• Encephalomalacic cystic defect– Consistent with
leptomeningeal cyst