**Core Concept**
Pseudotumor syndrome, also known as orbital pseudotumor, is a condition where inflammation occurs in the muscles or tissues surrounding the eyeball, mimicking the symptoms of a tumor but without any actual neoplastic growth. This condition is characterized by pain, swelling, and redness in the orbit, often accompanied by vision disturbances.

**Why the Correct Answer is Right**
The exact cause of pseudotumor syndrome is unknown, but it is thought to result from an autoimmune response, where the body's immune system mistakenly attacks the tissues surrounding the eye. This can lead to inflammation and scarring, which can cause the symptoms associated with pseudotumor syndrome. The condition often responds to corticosteroid treatment, which can help reduce inflammation and alleviate symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Pseudotumor syndrome is not typically associated with traumatic injuries to the orbit, although trauma can cause other types of orbital injuries.
**Option B:** While pseudotumor syndrome can cause vision disturbances, it is not directly related to conditions such as glaucoma or age-related macular degeneration.
**Option C:** Pseudotumor syndrome is not a type of cancer, despite its name suggesting a tumor-like condition. It is an inflammatory condition, not a neoplastic one.

**Clinical Pearl / High-Yield Fact**
Pseudotumor syndrome can be challenging to diagnose, as its symptoms can mimic those of other orbital conditions. A thorough medical history, physical examination, and imaging studies are often necessary to distinguish pseudotumor syndrome from other conditions.

**Correct Answer:** D.