Pneumocephalus is the presence of air in the cranial vault.The common etiologies of pneumocephalus are brain trauma and cranial surgery.We report a case of a 26-year-old man with brain trauma who developed diffuse pneumocephalus after sneezing.CT scan was performed on arrival,and the image showed subarachnoid hemorrhage without pneumocephalus.On the seventh day after a big sneeze brain CT scan was re-performed,which showed pneumocephalus.After another ten days of treatment,the patient was discharged without any symptoms.
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