After a head injury, what is it called when air enters into the cerebrospinal fluid (CSF)Ðfilled spaces within the head?

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When air enters into the cerebrospinal fluid (CSF)-filled spaces within the head after a head injury, it is called pneumocephalus. This can result in pressure changes within the skull and can be a medical emergency requiring prompt treatment. Hemotympanum refers to blood in the middle ear, Battle's sign is a bruising behind the ear that may occur with a skull fracture, and Raccoon sign refers to bruising around the eyes that may also occur with skull fractures.

After a Head Injury, What Is It Called When Air