Pneumatocele is seen in fracture of: (A) Maxillary sinus, (B) Frontal sinus, (C) Ethmoid sinus, (D) Sphenoid sinus
Answer is B. Pneumatocele is a rare complication following head trauma. The pathophysiology is access of air into the cranium through a fracture involving air sinuses or middle ear roof or depressed fracture of the skull resulting in a craniodental fistula. Frontal bone fracture gives direct access to the cranium.