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Vol. 13. Issue 5.
Pages 389-392 (January 2002)
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Vol. 13. Issue 5.
Pages 389-392 (January 2002)
Quiste epidermoide de tercer ventrículo
Epidermoid tumour of the third ventricle
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M. Gelabert-González
, A. García-Allut, J. González-García, R. Martínez-Rumbo
Servicio de Neurocirugía. Hospital Clínico Universitario. Departamento de Cirugía. Universidad de Santiago de Compostela
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Resumen

Los quistes epidermoides intracraneales son tumoraciones de origen ectodérmico que representan menos del 1% de los procesos expansivos intracraneales. Las localizaciones más frecuentes son en el ángulo pontocerebeloso y la región quiasmática, aunque también se localizan en los hemisferios cerebrales o en las cavidades ventriculares.

Presentamos el caso de una mujer de 68 años ingresada por presentar una historia de 7 días de evolución de dolor de cabeza acompañada de náuseas y vómitos intermitentes. La tomografía computarizada mostró una masa hipodensa localizada en el tercer ventrículo asociada a hidrocefalia moderada. En resonancia magnética la tumoración se presentaba como hiposeñal en TI e hiperseñal en T2. Empleando un abordaje transcalloso se realizó con ayuda del aspirador ultrasónico una exéresis completa.

En la revisión de la literatura únicamente hemos encontrado otros 8 casos de quistes epidermoides localizados en el tercer ventrículo.

Palabras clave:
Quiste epidermoide Tumor intra-ventricular
Resonancia Magnética
Tercer ventrículo
Summary

Intracranial epidermoid tumours are very rare lesions of ectodermal origin that account for 1% of all intracranial tumours. The favourite sites affected by these tumours are the cerebellopontine angle and the chiasmal region. They also appear in the cerebral hemisphere and the intraventricular cavities.

We report a case of epidermoid tumour of the third ventricle. The patient was a 68year-old woman admit-ted in our service with a 7-days history of headaches and intermittent nausea and vomiting. A CT sean of the brain revealed a large hypodense mass in the third ventricle associated with hydrocephalus. An MRI was performed and revealed, on Tl-weighted image, an irregular nonhomogeneous lower signal in relation with CSF. This tumour showed a very bright signal intensity on T2-weighted images. A transcallosal approach of the tumour mass was performed via a right frontal cranio-tomy. Using an ultrasonic aspirator, the tumour was removed. In a review of the literature, we found only 8 reported cases.

Key words:
Epidermoid cyst
Intraventricular tumour
MR imaging
Third ventricle

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