[Trigeminal nerve dysfunction as a false localizing sign: a case of the choroid plexus papilloma in the IVth ventricle].
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.
Department of Neurosurgery, Hamamatu University, School of Medicine.
S
S
Nishizawa
T
T
Ninchoji
K
K
Uemura
H
H
Ryu
T
T
Yokoyama
I
I
Simoyama
Y
Y
Sugiura
H
H
Takahashi
D000328:Adult; D002551:Cerebral Ventricle Neoplasms / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D002831:Choroid Plexus; D004806:Ependymoma / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D005158:Facial Paralysis / Q000503:physiopathology; D005260:Female; D006801:Humans; D014057:Tomography, X-Ray Computed; D014276:Trigeminal Nerve / Q000503:physiopathology*