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"LEPTOMENINGEAL CYST"

“ Occurs following a paediatric skull fracture in about 1%, known as a ‘growing’ fracture. Fracture diastasis occurs due to adjacent CSF pu...

Occurs following a paediatric skull fracture in about 1%, known as a ‘growing’ fracture. Fracture diastasis occurs due to adjacent CSF pulsation and dural tears with arachnoid herniation. A pulsatile mass overlying the bone defect is found clinically.
CT

•  Smooth-edged defect in the calvarium and overlying soft-tissue mass
•  Gliosis of the adjacent brain parenchyma