Orbital floor fracture | Figure 1

CincyKidsRad

Cincinnati Children's Radiology


Orbital floor fracture

Coronal CT images of the orbit in bone (image 1) and soft tissue (image 2) windows display an orbital floor fracture with herniation of fat (arrow) and entrapment of the inferior rectus muscle (arrowhead). Orbital blowout fractures result from direct trauma. The trauma causes a sudden increase in intraorbital pressure, potentially leading to caudal displacement of bone fragments into the maxillary sinus. Orbital floor fractures are associated with entrapment of herniated orbital fat and muscles, thereby restricting motion. The inferior and medial orbital walls are most commonly affected in blow-out fractures.


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