Pneumocephalus is seen in fracture of
Maxillary sinus
Frontal sinus
Sphenoid sinus
Mastoid antrum
Pneumocephalus is the presence of air or gas within the cranial cavity.Pneumocephalus is seen in fracture of frontal sinus (Posterior table); may also be seen in ethmoid fracturesRef: Hazarika; 3rd ed; Pg 355
Nose and paranasal sinuses