**1. Introduction**

Frontal sinus fractures are relatively uncommon and are usually seen as a part of severe head injuries caused by high-velocity injuries. The management of frontal sinus fractures involves many difficulties since the frontal sinus is situated at the junction between the cranium and the face, and has anatomical features of both. Intracranial involvement should always be anticipated when upper facial trauma is suspected. Often the planning of how to treat frontal sinus fractures must actually be decided during the operation itself, because the fractures may extend more widely than predicted by pre-operative examination. Posterior wall fractures have more complications and a worse clinical outcome than fractures that only involve the anterior wall. Acute and chronic sinusitis, mucocele, mucopyocele, osteomyelitis, meningitis, and brain abscess are associated with frontal sinus injury. The purpose of this chapter is to present an overview of the frontal sinus fractures, associated injuries and a rationale for selecting surgical approach to frontal sinus injury.
