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Vol. 23. Num. 3.May 2012Pages 89-130
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Vol. 23. Num. 3.May 2012Pages 89-130
DOI: 10.1016/j.neucir.2012.02.001
Contralateral approach for middle cerebral artery aneurysms with long M1 segment, report of 2 cases
Abordaje contralateral en aneurismas de la arteria cerebral media con segmento M1 largo, a propósito de dos casos
Ignacio Arresea,
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Corresponding author.
, Rosario Sarabiaa
a Unit of Vascular Neurosurgery, Hospital Universitario Río Hortega, Valladolid, Spain
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Contralateral clipping of middle cerebral artery (MCA) aneurysms is not practiced widely and has been reported only in case series. Some of the neurosurgeons proposing this approach have even postulated that a short M1 segment is a basic requirement for performing it.


We present our experience using a contralateral approach with 2 patients who had 3 MCA aneurysms located more than 2.5cm from the carotid bifurcation. All 3 aneurysms were completely occluded, as demonstrated on postoperative CT angiography, and the patients’ neurological evolution was uneventful.


The contralateral approach can be regarded as a safe and effective technique for MCA aneurysm clipping. One contraindication frequently stated is the length of the MCA M1 segment; however, our experience proves that long distances can be reached if an adequate Sylvian fissure dissection is performed. We consider that the use of a contralateral approach requires fine technical skills and should be the choice only under judicious case-to-case planning, always bearing the preferences and experience of the neurosurgeon in mind.

Middle cerebral artery
Contralateral approach

El abordaje contralateral en aneurismas de la arteria cerebral media (ACM) no es muy utilizado, debido a las dificultades técnicas que plantea la distancia de disección tan larga. Incluso se ha promulgado que, en los casos en los que el segmento M1 de la ACM sea muy largo, estaría contraindicado el uso de este abordaje contralateral.


Presentamos nuestra experiencia con tres aneurismas en dos pacientes a los que se realizó abordaje contralateral, pese a estar situados a más de 2,5cm de la bifurcación carotídea. En los tres aneurismas se comprobó el correcto pinzamiento mediante angio-tomografía computarizada postoperatoria y la evolución neurológica de los dos pacientes cursó sin complicaciones.


El abordaje contralateral en aneurismas de la ACM es una técnica segura y eficaz. Con una buena disección de la cisura de Silvio, se pueden alcanzar distancias muy superiores a las propuestas en la bibliografía. Aun así, dada la mayor dificultad técnica de este abordaje contralateral, cada neurocirujano debe evaluar su utilización caso por caso, y siempre basándose en su experiencia y preferencias personales.

Palabras clave:
Arteria cerebral media
Abordaje contralateral


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