Orbital blow-out fracture with inferior rectus muscle entrapment

Case contributed by Ammar Haouimi
Diagnosis certain

Presentation

Motocycle accident two weeks prior.

Patient Data

Age: 17 years
Gender: Male
This study is a stack
Axial
non-contrast
This study is a stack
Coronal
non-contrast
This study is a stack
Axial bone
window
This study is a stack
Coronal
bone window
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Info

Right orbital floor blow-out fracture with prolapsed orbital fat and inferior rectus muscle into the maxillary sinus through the fracture gap. No associated medial or superior blow-out fractures were seen. Normal appearance of the other extraocular muscles, optic nerves and ocular globes. Extensive subgaleal haematoma containing numerous radiopaque foreign bodies.

Case Discussion

Orbital floor blow-out fractures are the most common. Orbital fat prolapses into the maxillary sinus and may be joined by prolapse of the inferior rectus muscle (as in this case).

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