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Case Reports
Journal Article
Diagnostic value of Hoover sign and motor-evoked potentials in acute somatoform unilateral weakness and sensory impairment mimicking vascular stroke.
Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia 2012 July
Acute unilateral weakness along with sensory impairment is commonly caused by obstruction of major cortical arteries in either adults or children. A somatoform presentation mimicking acute vascular stroke is very rare, especially in the pediatric age group. Here we report three adolescents presenting with acute unilateral weakness and sensory impairment along with diminished tendon reflexes who were suspected to have an acute stroke but who had developed a somatoform psychogenic disorder. Two adolescents had complete hemiplegia and one had weakness of the left leg - two had moved the alleged paralytic limbs during sleep. A normal Hoover sign was suggestive of a somatoform psychogenic etiology rather than true vascular stroke. Cortical and spinal MRI, motor-evoked potentials (MEP) and somatosensory-evoked potentials were normal. All adolescents recovered completely. Therefore, a somatoform conversion reaction should be considered in children presenting with acute unilateral weakness and sensory alterations, which is corroborated by a normal Hoover sign and intact MEP.
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