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Fig. 1 | The Journal of Headache and Pain

Fig. 1

From: European Headache Federation guideline on idiopathic intracranial hypertension

Fig. 1

Diagnostic criteria for IIH (Friedman criteria). Diagnostic criteria for IIH and IIH without papilloedema. Infogram demonstrating the “grey zone” in which LP pressure is normal in some individuals but can indicate pathologically raised ICP in some. Measurements in the grey zone need to be interpreted with caution and patients must fit the other criteria for IIH for a diagnosis to be confirmed

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