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  • Title: [Trigeminal nerve dysfunction as a false localizing sign: a case of the choroid plexus papilloma in the IVth ventricle].
    Author: Nishizawa S, Ninchoji T, Uemura K, Ryu H, Yokoyama T, Simoyama I, Sugiura Y, Takahashi H.
    Journal: No Shinkei Geka; 1989 Mar; 17(3):273-7. PubMed ID: 2770966.
    Abstract:
    Trigeminal nerve dysfunction as a false localizing sign, although rate, is known to occur. A case of choroid plexus papilloma in the 4th ventricle with hemifacial numbness is presented. A 24-year-old woman had been suffering from intermittent facial numbness on the left side for 3 months prior to admission. She noted no other symptoms. Neurological examination disclosed marked papilledema, horizontal nystagmus on both lateral gazes and mild truncal ataxia. CT scans showed a calcified mass lesion in the 4th ventricle on the midline extending into the left lateral recess. It was enhanced homogeneously with contrast material. The pathogenesis of such a false localizing sign and its clinical implications were discussed from the anatomical point of view.
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