Question:
Which of the following is not a typical clinical feature of Idiopathic Intracranial Hypertension (IIH)?
Which of the following is not a typical clinical feature of Idiopathic Intracranial Hypertension (IIH)?
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Modified Dandy Criteria for IIH: Neurological examination MUST be entirely normal except for Papilledema and CN VI (Abducens) Palsy. Focal motor/sensory deficits = Exclude IIH and search for structural space-occupying lesions!
Updated On: Sep 3, 2026
- Headache
- Diplopia
- Papilledema
- Focal motor deficit
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The Correct Option is D
Solution and Explanation
Concept:
Idiopathic Intracranial Hypertension (IIH), historically termed pseudotumor cerebri, is a neurological disorder defined by elevated cerebrospinal fluid (CSF) opening pressure in the absence of a mass lesion, ventriculomegaly, infection, or structural venous obstruction.
Diagnostic evaluation is governed by the Modified Dandy Criteria.
Explanation:
• The Modified Dandy Criteria for diagnosing IIH require:
1. Symptoms and signs of increased intracranial pressure (ICP)
2. Completely normal neurological examination except for cranial nerve abnormalities (specifically isolated unifocal or bilateral cranial nerve VI palsies)
3. Elevated CSF opening pressure on lumbar puncture ($>25\text{ cm }\text{H}_2\text{O}$ in children; $>28\text{ cm }\text{H}_2\text{O}$ in sedated children) with normal CSF cytobiochemistry
4. Normal brain parenchyma and venography on neuroimaging (MRI/MRV showing only secondary signs like empty sella, optic nerve sheath distension, or transverse sinus stenosis)
• Headache (worse in the morning and with Valsalva maneuvers), bilateral papilledema, pulsatile tinnitus, and transient visual obscurations are core hallmark symptoms.
• Diplopia (horizontal, due to false-localizing abducens nerve CN VI paresis from downward stretching across the petrous temporal bone) is classic.
• The presence of a focal motor deficit (such as hemiparesis, hyperreflexia, or focal spasticity) is an absolute exclusion criterion for IIH and strongly points to a localized structural brain lesion (e.g., brain tumor, hematoma, or stroke).
Final Answer:
Focal motor deficits are not typical of IIH and their presence excludes the diagnosis under the Modified Dandy criteria.
Idiopathic Intracranial Hypertension (IIH), historically termed pseudotumor cerebri, is a neurological disorder defined by elevated cerebrospinal fluid (CSF) opening pressure in the absence of a mass lesion, ventriculomegaly, infection, or structural venous obstruction.
Diagnostic evaluation is governed by the Modified Dandy Criteria.
Explanation:
• The Modified Dandy Criteria for diagnosing IIH require:
1. Symptoms and signs of increased intracranial pressure (ICP)
2. Completely normal neurological examination except for cranial nerve abnormalities (specifically isolated unifocal or bilateral cranial nerve VI palsies)
3. Elevated CSF opening pressure on lumbar puncture ($>25\text{ cm }\text{H}_2\text{O}$ in children; $>28\text{ cm }\text{H}_2\text{O}$ in sedated children) with normal CSF cytobiochemistry
4. Normal brain parenchyma and venography on neuroimaging (MRI/MRV showing only secondary signs like empty sella, optic nerve sheath distension, or transverse sinus stenosis)
• Headache (worse in the morning and with Valsalva maneuvers), bilateral papilledema, pulsatile tinnitus, and transient visual obscurations are core hallmark symptoms.
• Diplopia (horizontal, due to false-localizing abducens nerve CN VI paresis from downward stretching across the petrous temporal bone) is classic.
• The presence of a focal motor deficit (such as hemiparesis, hyperreflexia, or focal spasticity) is an absolute exclusion criterion for IIH and strongly points to a localized structural brain lesion (e.g., brain tumor, hematoma, or stroke).
Final Answer:
Focal motor deficits are not typical of IIH and their presence excludes the diagnosis under the Modified Dandy criteria.
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