• Manish Jaiswal, Ashok Gandhi, Achal Sharma, and R S Mittal.
• Department of Neurosurgery, SMS Medical College and Hospital, JLN Marg, Jaipur, India.
• Pediatr Neurosurg. 2015 Jan 1; 50 (1): 53-5.

BackgroundGrowing skull fracture (GSF)/pseudomeningocele is a rare complication of head injury in children. Post-traumatic intradiploic arachnoid cyst (PTIAC) is a variant but it is extremely rare. PTIACs are usually asymptomatic or with mild symptoms like headache. The rupture of PTIAC due to re-trauma leading to pseudomeningocele formation has not been seen or reported before.Patient And MethodWe present a case of occipital PTIAC where pseudomeningocele developed after re-trauma, and discuss the pathogenesis and management.ResultEn masse removal of the ruptured PTIAC was performed along with dural-defect repair. The post-operative recovery was good.ConclusionPTIAC is an extremely rare occurrence as a variant of GSF. It is usually asymptomatic, but it may rupture with trivial trauma due to a thinned-out outer table and then converts into pseudomengocele. En masse excision with dural-defect repair gives good results in cases of ruptured PTIAC due to re-trauma.

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