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Vol. 12. Issue 1.
Pages 17-22 (January 2001)
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Vol. 12. Issue 1.
Pages 17-22 (January 2001)
Meningiomas del surco olfatorio: Revisión de una serie de 27 casos
Olfactory groove meningiomas: Review of a series of 27 cases
A. Lagares, R.D. Lobato, S. Castro, R. Alday, A. De la Lama, J.F. Alen, P. González
Servicio de Neurocirugía. Hospital 12 de Octubre. Madrid
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Objetivos

Describir nuestra experiencia con los meningiomas del surco olfatorio, analizando su forma de presentación clínica y radiológica, así como el tratamiento y los resultados.

Material y métodos

Se analizaron retrospectivamente las historias clínicas de 27 pacientes diagnosticados de meningioma del surco olfatorio extraídos de la serie de meningiomas operados en este centro desde el año 1973. Se recogieron datos demográficos, la clínica de presentación y la duración de la sintomatología previa al diagnóstico. Se revisaron también diversas características radiológicas como el tamaño tumoral, el edema cerebral acompañante, el tipo de captación de contraste, la aparición de endóstosis y la invasión de la base craneal. Se analizaron asimismo el grado de resección quirúrgica, el tipo histológico y presencia de recidivas en el seguimiento.

Resultados

La edad media de presentación fue de 59 años. La duración media de la clínica previa al diagnóstico fue de 39 meses. La clínica más frecuente de presentación fue el deterioro de funciones superiores que ocurrió en un 52% de los casos. El diámetro tumoral máximo medio fue de 6,2cm. El 61% de los enfermos presentaban edema moderado o severo, siendo con gran frecuencia (74%) bilateral. Se observó endóstosis radiológica en el 37% de los casos y en ninguno se apreciaron signos de infiltración ósea. El abordaje utilizado fue el basal frontal uní o bilateral, siendo el grado de resección Simpson II en todos los casos. La mayor parte de los tumores intervenidos presentaron una histología típica. Más del 80% de los enfermos presentaron buena evolución al alta. Ninguno de los enfermos operados ha presentado una recidiva tumoral, siendo en conjunto la mediana de seguimiento radiológico de 74 meses

Conclusiones

El surco olfatorio es una localización infrecuente para los meningiomas, constituyendo el 4,5% del total de meningiomas de nuestro servicio.

Palabras clave:
Meningioma
Surco olfatorio
Edema cerebral
Tumor intracraneal
Abstract
Objetive

To describe our experience with olfactory groove meningiomas, analysing their clinical and radiological form of presentation and their surgical treatment.

Methods

The clinical records of 27 patients diagnosed of olfactory groove meningioma, extracted from the series of meningiomas operated on in our department since 1973, were retrospectively reviewed. Demographical data, the clinical presentation and duration of the symptoms before diagnosis were collected. Several radiological characteristics were also reviewed such as the tumour size, associated brain edema, type of contrast enhancement, presence of endostosis and invasion of the cranial base. The surgical resection grade, the histological type and the presence of recurrences in the follow-up were also analysed.

Results

The average age at presentation was 59 years. Average duration of symptoms prior to diagnosis was 39 months. The most frequent symptom at presentation was higher function impairment (52%), The average máximum tumoral diameter was 6,2cm. 61 % of the patients presented moderate or severe brain edema, which was quite frequently bilateral (74%). Radiological endostosis was present in 37% of the cases, but there were no signs of bone invasion in any case. The approach used was the basal frontal, uni or bilateral. In all cases the grade of resection was Simpson II. The majority of the cases presented a typical histology. Over 80% of the cases presented a good recovery at discharge. None of the patients presented with a tumoral recurrence after an average radiological follow-up of 74 months.

Conclusion

The olfactory groove is an infrequent location for intracranial meningiomas, accounting for only 4,5% of all meningiomas in our experience. These tumours reach a big size due to the delay in diagnosis. Drilling of the cranial base does not seem necessary for preventing tumoral recurrence.

Key words:
Meningioma
Olfactory groove
Brain edema
Intracranial tumor

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