**Question:** In papilledema, all the following are true except

A. Increased intracranial pressure
B. Enlargement of the optic disc
C. Reduced visual acuity
D. Normal optic nerve examination

**Core Concept:** Papilledema is a clinical sign characterized by the enlargement of the optic disc due to increased intracranial pressure. This condition is often observed in cases of elevated intracranial pressure, such as those caused by hydrocephalus, subarachnoid hemorrhage, or brain tumors. Papilledema can lead to symptoms like reduced visual acuity and may be a sign of a more severe underlying neurological issue.

**Why the Correct Answer is Right:** Option D, "Normal optic nerve examination," is incorrect because papilledema is characterized by the visual manifestation of optic nerve swelling, not normal examination findings. While increased intracranial pressure is a fundamental aspect of papilledema, it is not the sole factor contributing to this condition. Enlargement of the optic disc and reduced visual acuity are more indicative of papilledema than increased intracranial pressure alone.

**Why Each Wrong Option is Incorrect:**

A. **Increased intracranial pressure:** While increased intracranial pressure is a fundamental aspect of papilledema, it is not the sole factor contributing to this condition. Enlargement of the optic disc and reduced visual acuity are more indicative of papilledema than increased intracranial pressure alone.

B. **Normal optic nerve examination:** Papilledema is characterized by the visual manifestation of optic nerve swelling, not normal examination findings.

C. **Normal visual acuity:** Papilledema often presents with reduced visual acuity, not normal visual acuity. In some cases, visual acuity might appear normal at first, but papilledema can lead to visual field defects and eventually permanent visual loss.

**Clinical Pearl:** Papilledema is a crucial clinical sign to identify, as it indicates a potential neurological condition that requires further evaluation for accurate diagnosis and appropriate treatment. In cases of papilledema, further examination should focus on visual field testing and assessment of other neurological symptoms.