**Orbital Cellulitis Complications**

**Core Concept**
Orbital cellulitis is an infection of the soft tissues surrounding the eye, which can be caused by bacteria or fungi. It is a medical emergency that requires prompt treatment to prevent complications. The complications of orbital cellulitis can be severe and potentially life-threatening.

**Why the Correct Answer is Right**
Orbital cellulitis complications include cavernous sinus thrombosis, which is a blood clot in the cavernous sinus, a group of veins located behind the eye. This can lead to increased intracranial pressure, vision loss, and potentially life-threatening complications. The correct answer is one of the complications of orbital cellulitis, making it incorrect as a complication.

**Why Each Wrong Option is Incorrect**
* **Option A:** Orbital cellulitis itself is a complication, so this option is incorrect.
* **Option B:** Cavernous sinus thrombosis is a known complication of orbital cellulitis, making this option incorrect.
* **Option C:** Cerebral abscess is a possible complication of orbital cellulitis, particularly if the infection spreads to the brain, making this option incorrect.
* **Option D:** Not a complication of orbital cellulitis (this is the correct answer, but it's a placeholder).

**Clinical Pearl / High-Yield Fact**
It's essential to recognize the signs and symptoms of orbital cellulitis, such as proptosis, chemosis, and decreased vision, and to initiate prompt treatment to prevent complications. Cavernous sinus thrombosis is a medical emergency that requires immediate attention.

**Correct Answer: D. Not a complication of orbital cellulitis**