Orbital blow out fracture
Found face down on concrete.
Brain and Facial Bones
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- Left frontal scalp haematoma extending into the lateral periorbital soft tissues.
- No intracranial haemorrhage.
- Left periorbital haematoma.
- Blow out fracture of the left orbital floor and lamina papyracea with involvement of the infraorbital nerve and entrapment of orbital fat. Inferior oblique is also displaced inferiorly.
- Numerous gas locules seen within the orbital soft tissues.
- Mildly depressed left medial orbital wall fracture with opacification of the adjacent ethmoid air cells.
- Undisplaced fracture through the left zygoma.
- Minimally displaced nasal bone fracture, deviated to the right.
1 case question available
There are two broad categories of blow-out fractures. Open door fractures (seen in this case) are a large and displaced fracture and are frequently comminuted. Trap door fractures are linear and hinged and minimally displaced. Trap door fractures typically occur in the paediatric population and have a high incidence of extra-ocular muscle entrapment. Other facial bone fractures are commonly present when there is an orbital fracture.
- Hopper RA, Salemy S, Sze RW. Diagnosis of Midface Fractures with CT: What the Surgeon Needs to Know 1. Radiographics 2006;26(3):783-793.
- Winegar BA, Murillo H, Tantiwongkosi B. Spectrum of Critical Imaging Findings in Complex Facial Skeletal Trauma. Radiographics 2013 01/01; 2015/01;33(1):3-19.