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Vol. 26. Num. 6.November - December 2015
Pages 261-310
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Vol. 26. Num. 6.November - December 2015
Pages 261-310
Case report
DOI: 10.1016/j.neucir.2015.05.001
Hemifacial spasm caused by a cerebellopontine angle arachnoid cyst. Case report and literature review
Espasmo hemifacial causado por un quiste aracnoideo del ángulo pontocerebeloso. Caso clínico y revisión de la literatura
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Fernando Ruiz-Juretschke
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doc.fer@gmx.de

Corresponding author.
, Antonio Vargas, Rosario González-Rodrigalvarez, Roberto Garcia-Leal
Department of Neurosurgery, Hospital General Universitario “Gregorio Marañón”, Madrid, Spain
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Table 1. Arachnoid cysts of the CPA causing hemifacial spasm.
Abstract

Arachnoid cysts involving the cerebellopontine angle are an unusual cause of hemifacial spasm. The case is reported of a 71-year old woman presenting with a right hemifacial spasm and an ipsilateral arachnoid cyst. Preoperative magnetic resonance imaging findings suggested a neurovascular compression caused by displacement of the facial-acoustic complex and the anterior inferior cerebellar artery by the cyst. Cyst excision and microvascular decompression of the facial nerve achieved permanent relief. The existing cases of arachnoid cysts causing hemifacial spasm are reviewed and the importance of a secondary neurovascular conflict identification and decompression in these cases is highlighted.

Keywords:
Hemifacial spasm
Arachnoid cyst
Cerebellopontine angle
Microvascular decompression
Resumen

Los quistes aracnoideos del ángulo pontocerebeloso son una causa inusual de espasmo hemifacial. Describimos el caso de una mujer de 71 años que presentaba un espasmo hemifacial derecho y un quiste aracnoideo ipsilateral. Los hallazgos de la resonancia magnética preoperatoria indicaban una compresión neurovascular provocada por el desplazamiento del complejo nervioso facial-acústico y de la arteria cerebelosa anteroinferior por el quiste. La extirpación del quiste y la descompresión microvascular del nervio facial consiguieron un alivio permanente del espasmo. Se revisan los casos conocidos de espasmo hemifacial secundario a un quiste aracnoideo y se resalta la importancia de identificar un conflicto neurovascular secundario y de realizar una descompresión en estos casos.

Palabras clave:
Espasmo hemifacial
Quiste aracnoideo
Ángulo pontocerebeloso
Descompresión microvascular

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