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Medicine (MD/DO)
Other Nervous System Pathology
Pseudotumor Cerebri: Risk Factors And Presentation

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Pseudotumor Cerebri: Risk Factors And Presentation

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Pseudotumor Cerebri: Risk Factors And Presentation

Sumo-tumor on head
Increased Intracranial Pressure With Unknown Etiology
High-pressure pot-head with question mark

Pseudotumor cerebri is characterized by increased intracranial pressure with no known direct cause (such as trauma, tumors, or hypoxic injury). There is currently no defined underlying etiology or physiologic process thought to lead to this condition, though the risk factors are well known.

Women of Childbearing Age
Young women

Pseudotumor cerebri has a propensity to occur in obese women between the ages of 15 and 44. The exact cause for this observation is unknown.


Pseudotumor cerebri tends to occur more in obese patients, with one prospective study demonstrating that of 50 patients diagnosed with pseudotumor cerebri, 94% were obese.

Vitamin A Excess

Hypervitaminosis A is a known risk factor for development of pseudotumor cerebri, though the exact cause of this relation is unknown. Excess vitamin A levels are typically acquired through excessive intake from diet, vitamin supplements, or in medications such as isotretinoin or Acutane.


Tetracyclines such as doxycycline and minocycline have been linked to cases of pseudotumor cerebri, though the exact mechanism underlying the association is unknown.


Papilledema is considered the hallmark physical exam sign of pseudotumor cerebri. It is typically present bilaterally and is characterized by blurred disc margins on fundoscopic exam.


One of the most ubiquitously reported symptoms in patients with pseudotumor cerebri is headache, though this is a very non-specific symptom.

Double-vision of eyes

Patients with IIH may experience diplopia or double vision. This is a result of cranial nerve VI (abducens) palsy. The sixth cranial nerve in particular is affected because of its long course through the intracranial space, making it particularly susceptible to the effects of increased intracranial pressure.

Cranial Nerve VI (Abducens) Palsy
Brainstem-guy and 6-abs guy

The diplopia seen in pseudotumor cerebri is caused by a palsy of the sixth cranial nerve, the abducens nerve. Recall that this nerve innervates the lateral rectus muscle which allows abduction, or external rotation, of the eye.

No Altered Mental Status
No sign- delta chips halo

Patients with IIH will characteristically not have mental status changes. This is important in differentiating this condition from other intracranial processes such as tumor, infarction, and infection.


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