IIH with normal CSF pressures.

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Date
2013-11
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Abstract
Idiopathic intracranial hypertension (IIH) is a condition of raised intracranial pressure (ICP) in the absence of space occupying lesions. ICP is usually measured by lumbar puncture and a cerebrospinal fluid (CSF) pressure above 250 mm H2O is one of the diagnostic criteria of IIH. Recently, we have encountered two patients who complained of headaches and exhibited disc swelling without an increased ICP. We prescribed acetazolamide and followed both patients frequently; because of the definite disc swelling with IIH related symptoms. Symptoms and signs resolved in both patients after they started taking acetazolamide. It is generally known that an elevated ICP, as measured by lumbar puncture, is the most important diagnostic sign of IIH. However, these cases caution even when CSF pressure is within the normal range, that suspicion should be raised when a patient has papilledema with related symptoms, since untreated papilledema may cause progressive and irreversible visual loss.
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Keywords
Acetazolamide, idiopathic intracranial hypertension, normal pressure pseudotumor cerebri, papilledema
Citation
Suh Soh Youn, Kim Seong-Joon. IIH with normal CSF pressures. Indian Journal of Ophthalmology. 2013 Nov ; 61 (11): 681-682.