Table 1.

Battery of tests conducted as preoperative workup of NSC cases

Name of tests	Purpose
NCCT head with 3D reconstruction	For characterization of synostosis
MRI brain with CVJ	To look for brain parenchymal changes and associated hindbrain malformations
MR venogram	To look for abnormal cortical venous anatomy that required for preoperative planning
Neuroopthalmological evaluation	Fundus examination	For papilledema
	Optical coherence tomography	To look for retinal thickness changes due to raised ICP
	Optic nerve sheath diameter	To look for thinning due to raised ICP
	Visual acuity	For preoperative documentation
ENT evaluation	To find out associated nasal and oropharyngeal malformation
Pediatric neurological evaluation	For developmental and psychiatric assessment
Genetic evaluation	To find out association with some genetic syndromes