What's the most likely diagnosis?
- 22 year-old with diplopia
- Nasal bone fracture
- Retinoblastoma
- Sinusitis
- Cellulitis
- Blowout fracture
Answer:
5. Blowout fracture
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Blowout Fracture of the Orbit
General Considerations
- Isolated fractures, most commonly of the orbital floor
- The cause is sudden, direct, blunt trauma in the form of a blow to the orbit with increase in intraorbital pressure
- The orbital rim is relatively strong so force is transmitted to the weakest parts of the orbit which “blow-out”
- Orbital floor which is the superior boundary of the maxillary sinus, or
- Medial wall (the thin lamina papyracea) which is the lateral boundary of the ethmoid sinus
- The nasal bone is also frequently fractured
- The cause is usually a large object such as baseballs, fists, automobile accidents, tennis balls and kicks
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