➡️Skull fractures are classified in three ways: by pattern into (linear, comminuted, and depressed), by anatomic location into (vault, basilar), and by skin integrity into (open, and closed).
➡️Depressed skull fractures must by definition have displacement of bone greater than the full thickness of the adjacent calvarial thickness.
➡️Open fractures, by definition, have either a skin laceration over the fracture or the fracture runs through the paranasal sinuses and the middle ear structures, resulting in communication between the external environment and the cranial cavity.
➡️Pneumocephalus is the presence of air within the cranial cavity.it is usually associated with disruption of the skull: after head and facial trauma.