A<unk>  is a fracture of the walls or floor of the orbit. Intraorbital material may be pushed out into one of the paranasal sinuses. This is most commonly caused by blunt trauma of the head, generally personal altercations.
Blowout fracture
Rolando fracture
Chance fracture
Avulsion fracture
Stress fracture
Burst fracture
Maisonneuve fracture
Ankle fracture