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Vol. 25. Issue 3.
Pages 140-144 (May - June 2014)
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Vol. 25. Issue 3.
Pages 140-144 (May - June 2014)
Case report
Full endoscopic endonasal transclival approach: Meningioma attached to the ventral surface of the brainstem
Abordaje endonasal transclival: Meningioma implantado en la superficie ventral del tronco cerebral
Juan Antonio Simal Julian
Corresponding author
juanantonio.simal@gmail.com

Corresponding author.
, Pablo Sanromán Álvarez, Pablo Miranda Lloret, Estela Plaza Ramirez, Pedro Pérez Borreda, Carlos Botella Asunción
Neurosurgical Department, HUyP La Fe de Valencia, Valencia, Spain
Article information
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Table 1. Published infratentorial meningiomas without dural attachment.
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Abstract
Background

Intracranial meningiomas without dural attachment (MWODA) are rare entities. We present the first case published, to the best of our knowledge, regarding a MWODA attached to the ventral surface of the brainstem. This location makes the patient subsidiary to treatment through an expanded endonasal transclival approach.

Clinical presentation

A 16-year-old female with suspected diagnosis of recurrence of a clear cell meningioma (CCM) at a distance from the initial lesion, located on the premedullary cistern. The patient underwent a pure endoscopic low transclival approach. The attachment to the ventral surface of the brainstem was confirmed intraoperatively. Postoperative MRI confirmed gross total resection and treatment was complemented with adjuvant fractionated stereotactic radiotherapy. No complications related to the procedure were observed.

Conclusion

MWODA may appear attached to the ventral brainstem. The expanded endonasal approach to the clivus provides a critical anatomical advantage in the treatment of medial lesions, even ventral meningiomas, to the lower cranial nerves. Reconstruction principles must be strictly respected to reduce complications.

Keywords:
Transclival approach
Dural attachment
Endonasal
Endoscope
Meningioma
Resumen
Introducción

Los meningiomas sin implantación dural MSID son una rara entidad. Presentamos el primer caso publicado en nuestro conocimiento, de MSID implantado en la superficie ventral del tronco cerebral. Dicha localización permite la realización de un abordaje quirúrgico endonasal expandido transclival para su tratamiento.

Caso clínico

Paciente mujer de 16 años con la sospecha de presentar una recurrencia de meningioma de células claras localizada en la cisterna prebulbar a distancia de la lesión inicialmente tratada. Se llevó a cabo un abordaje endonasal expandido transclival. El hallazgo de implantación en la cara ventral del tronco cerebral fue claramente evidenciado en el acto quirúrgico. La RM cerebral postoperatoria confirmó la resección completa y el tratamiento fue completado con radioterapia estereotáctica fraccionada. No se presentaron complicaciones relacionadas con los procedimientos.

Conclusión

Los MSID pueden presentarse en íntima relación con la cara ventral del tronco cerebral. El abordaje endonasal expandido transclival otorga ventajas anatómicas importantes a la hora de tratar lesiones de localización medial, incluso meningiomas ventrales a los pares craneales bajos. Las técnicas reconstructivas deben ser estrictamente respetadas para minimizar complicaciones.

Palabras clave:
Abordaje transclival
Endonasal
Endoscopio
Implantación dural
Meningioma

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