Abordaje temporopolar para la cirugía de aneurismas intracraneales de la circulación posterior: Informe de 2 casos / Temporopolar approach to intracraneal aneurysms surgery of the posterior circulation: to cases report

Los aneurismas intracraneales de la circulación posterior representan un reto para la neurocirugía contemporánea y para la neurorradiología intervencionista, debido a la complejidad anatómica de su topografía que predispone a la aparición de complicaciones. La oclusión endovascular representa la opción más acertada para el tratamiento de estas lesiones, pero al no existir una cobertura adecuada para todos los pacientes, la microcirugía representa una alternativa para el manejo de los pacientes con esta compleja enfermedad. En el presente trabajo se presentan dos casos intervenidos quirúrgicamente, uno con un aneurisma del tope de la basilar y otro con uno de la arteria cerebelosa superior izquierda, en los que se utilizó un abordaje temporopolar descrito por Sano, con resultados satisfactorios. Se concluye que este abordaje representa una alternativa adecuada al resto de las técnicas usadas para el tratamiento quirúrgico de estas lesiones

Intracranial aneurysms of the posterior circulation represent a challenge for contemporary neurosurgery and interventional neuroradiological procedures due to the anatomical complexity of its topography that predispose on the occurrence of complications. The endovascular occlusion represents the best option for the treatment of these injuries, but at not existing a coverage suitable for all patients, microsurgery continues representing an alternative for the management of patients with this complex disease. In this paper we present two cases operated, one with a basilar tip aneurysms and another one in the left superior cerebellar artery in which a temporopolar approach described by healthy, with successful results was used. We conclude that this approach represents an alternative to the rest of the techniques used for the surgical treatment of these injuries

Frontosupraorbital Approach and Orbitozygomatic Temporopolar Approach for High Basilar Aneurysms

Surgery of aneurysms around the basilar bifurcation artery is still one of the most difficult and challenging operations in the field of neurosurgery, because of their rare occurrences, unfamiliar anatomy and deeply located lesions. Two major surgical approaches, pterional approach and subtemporal approach, are conventionally used for upper basilar artery aneurysm. Neither approach, however, ensures easy treatment of high basilar bifurcation aneurysm, because there is always the chance of excessive retraction of the brain, nerves and vessels. In order to gain sufficient exposure of highly placed basilar bifurcation aneurysms, the surgical approach needs to be in the direction in which the surgeon can see the interpeduncular fossa from below. In an attempt to gain better exposure of these lesions, neurosurgeons have used a variety of surgical approaches. We have used forntosupraorbital(FSO) approach and orbitozygomatic temporopolar(OZTP) approach for seven cases of high basilar aneurysm including basilar bifurcation artery-SCA aneurysm. The advantage of these approaches are multidirectional view, wide operative field, less brain retraction and easy application of temporary clip. Therefore, authors would like to recommended these approaches in case of for high basilar aneurysm as a effective method of aneurysmal neck clipping.

Zygomatic Temporopolar Approach to High Placed P1 Aneurysm

The authors describe the case of a 57-year-old female who developed subrachnoid hemorrhage secondary to rupture of posteriorly projecting, high placed aneurysm of the proximal posterior cerebral artry. This aneurysm was treated easily and successfully with the zygomatic temporopolar approach which was modification of the temporopolar approach proposed by Sano by detaching the zygomatic arch to get a wide and flexible operating field.