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JOURNAL ARTICLE
OBSERVATIONAL STUDY
The efficacy of orbital ultrasonography and magnetic resonance imaging findings with direct measurement of intracranial pressure in distinguishing papilledema from pseudopapilledema.
Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery 2017 September
INTRODUCTION: The goal of this study was to evaluate the utility of orbital ultrasonography and magnetic resonance imaging in the diagnosis of idiopathic intracranial hypertension (IIH).
METHOD: We reviewed the medical records of patients referred to our department for suspected IIH.
RESULTS: Seven children were diagnosed with IIH. Nine children revealed pseudopapilledema by optic coherence tomography and/or orbital ultrasonography. When the axial sequences were reexamined, patients with papilledema had optic nerve sheath (ONS) enlargement (6.62 ± 0.70 mm); patients with pseudopapilledema had ONS diameter as 4.62 ± 0.64 mm. There was a significant correlation between the CSF opening pressure and ONS diameter (p < 0.005, r = 0.661). In the papilledema group, the presence of proposed subtle markers as increased tortuosity in the optic nerve was found in six patients. Five of seven patients had a target sign, intraocular protrusion of the optic nerve, and posterior globe flattening.
DISCUSSION: Ophthalmological review is important to avoid unnecessary procedures for detection of true papilledema. ONS diameter is a reliable neuroimaging marker as other subtle markers.
METHOD: We reviewed the medical records of patients referred to our department for suspected IIH.
RESULTS: Seven children were diagnosed with IIH. Nine children revealed pseudopapilledema by optic coherence tomography and/or orbital ultrasonography. When the axial sequences were reexamined, patients with papilledema had optic nerve sheath (ONS) enlargement (6.62 ± 0.70 mm); patients with pseudopapilledema had ONS diameter as 4.62 ± 0.64 mm. There was a significant correlation between the CSF opening pressure and ONS diameter (p < 0.005, r = 0.661). In the papilledema group, the presence of proposed subtle markers as increased tortuosity in the optic nerve was found in six patients. Five of seven patients had a target sign, intraocular protrusion of the optic nerve, and posterior globe flattening.
DISCUSSION: Ophthalmological review is important to avoid unnecessary procedures for detection of true papilledema. ONS diameter is a reliable neuroimaging marker as other subtle markers.
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