Synonyms : Cranial Airocele, Pneumocephalus, Epidural, Pneumocephalus, Traumatic, Pressure Pneumocephalus, Airocele, Cranial, Airoceles, Cranial, Cranial Airoceles, Cranial Pneumocysts, Epidural Pneumocephalus, Gas, Intracranial, Pneumocephalus, Pressure