**Core Concept**
Pseudotumor cerebri, also known as idiopathic intracranial hypertension (IIH), is a condition characterized by increased intracranial pressure without any identifiable cause. It is often associated with headaches, visual disturbances, and papilledema.

**Why the Correct Answer is Right**
Pseudotumor cerebri typically presents with symptoms such as headache, transient visual obscurations, and papilledema due to increased intracranial pressure. The condition is often seen in young, obese women with normal cerebrospinal fluid (CSF) composition and pressure. The absence of focal neurological deficits, such as weakness or sensory loss, is a hallmark of pseudotumor cerebri.

**Why Each Wrong Option is Incorrect**
**Option A:** Increased intracranial pressure is a key feature of pseudotumor cerebri. Therefore, option A is incorrect as it describes a characteristic of the condition.
**Option B:** Papilledema is a common finding in pseudotumor cerebri due to increased intracranial pressure. Thus, option B is also incorrect as it is a feature of the condition.
**Option C:** Headache is a primary symptom of pseudotumor cerebri, often described as a daily, worsening headache. Therefore, option C is incorrect as it is a feature of the condition.

**Clinical Pearl / High-Yield Fact**
Pseudotumor cerebri should be considered in the differential diagnosis of headaches in young, obese women, especially if there are visual disturbances or papilledema. A comprehensive evaluation, including imaging studies and CSF analysis, is essential to rule out other causes of increased intracranial pressure.

**Correct Answer: D. Focal neurological deficits.**