Microsurgical resection of foramen magnum meningioma through a transcondylar approach: three-dimensional operative video.

Foramen magnum (FM) meningiomas are challenging lesions. We present the case of a 38-year-old female with neck pain, dysphonia, and slight twelfth nerve palsy. Imaging workup was highly suggestive of an FM meningioma, and microsurgical resection with the aid of intraoperative neurophysiological monitoring was indicated. A transcondylar approach was employed, the vertebral artery was mobilized, and the tumor was completely removed. Postoperative MRI demonstrated complete resection. There were no signs of cervical instability. The patient presented with improvement of her symptoms and no new neurological deficit on follow-up. FM meningiomas can be successfully resected using a transcondylar approach, since it increases the exposure of the ventral FM, allowing the surgeon to work parallel to the skull base and flush with the tumor's attachment. Informed consent was obtained from the patient for publication of this operative video. The video can be found here: https://youtu.be/itfUOB-6zM0.

The extended pterional approach allows excellent results for removal of anterior cranial fossa meningiomas.

Objective To describe a unique operative strategy, instead the classical pterional approach, and to analyses it safety and effectiveness for removal of anterior cranial fossa meningiomas. Method We identify 38 patients with tuberculum sellae and olphactory groove meningiomas operated between 1986 and 2013. Medical charts, operative reports, imaging studies and clinical follow-up evaluations were reviewed and analyzed retrospectively. The pterional craniotomy is extended toward the frontal bone providing access through the subfrontal route, besides the usual anterolateral view provided by the classical pterional approach. Results Surgical mortality occurred in one patient (2.6%). Gross total resection was achieved in 27 patients (86.8%). Median time of follow-up was 69.4 months. Conclusion The extended pterional approach allows excellent results. Total removal of meningiomas of the anterior cranial fossa was obtained in 86.8 % of patients, with low morbidity and mortality.

The extended pterional approach allows excellent results for removal of anterior cranial fossa meningiomas / O acesso pterional extendido permite excelente resultado para a ressecção dos meningiomas da fossa craniana anterior

ABSTRACT Objective To describe a unique operative strategy, instead the classical pterional approach, and to analyses it safety and effectiveness for removal of anterior cranial fossa meningiomas. Method We identify 38 patients with tuberculum sellae and olphactory groove meningiomas operated between 1986 and 2013. Medical charts, operative reports, imaging studies and clinical follow-up evaluations were reviewed and analyzed retrospectively. The pterional craniotomy is extended toward the frontal bone providing access through the subfrontal route, besides the usual anterolateral view provided by the classical pterional approach. Results Surgical mortality occurred in one patient (2.6%). Gross total resection was achieved in 27 patients (86.8%). Median time of follow-up was 69.4 months. Conclusion The extended pterional approach allows excellent results. Total removal of meningiomas of the anterior cranial fossa was obtained in 86.8 % of patients, with low morbidity and mortality.

RESUMO Objetivo Descrever a craniotomia pterional estendida, ao invés da abordagem pterional clássica, e analisar sua segurança e eficácia para a remoção dos meningiomas da fossa anterior. Método Identificamos 38 pacientes com meningiomas do tubérculo da sela e da goteira olfatória operados entre 1986 e 2013. Os prontuários, relatórios cirúrgicos, exames de imagem e acompanhamento pós-operatório foram analisados retrospectivamente. A craniotomia pterional com extensão para o osso frontal permite acesso pela via subfrontal além da via anterolateral do acesso pterional clássico. Resultados A mortalidade cirúrgica foi de 2,6% (um paciente). A remoção total foi alcançada em 86,8% (27 pacientes) com um tempo médio de seguimento de 69,4 meses. Conclusão A abordagem pterional estendida permite excelentes resultados. A remoção total dos meningiomas da fossa craniana anterior foi obtida em 86,8% dos pacientes, com baixa morbi-mortalidade.