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Vol. 65. Issue 5.
Pages 275-282 (September - October 2014)
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Vol. 65. Issue 5.
Pages 275-282 (September - October 2014)
Original article
Conservative Management of Vestibular Schwannoma
Manejo conservador del schwannoma vestibular
Visits
3072
Ricardo José González-Orús Álvarez-Morujo
Corresponding author
ricardomorujo@hotmail.com

Corresponding author.
, Itziar Álvarez-Palacios, Carlos Martin-Oviedo, Bartolomé Scola-Yurrita, Miguel Ángel Arístegui-Ruiz
Servicio de ORL, Hospital General Universitario Gregorio Marañón, Madrid, Spain
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Abstract
Introduction

Vestibular schwannoma (VS) is a benign, slow-growing tumour originating in the 8th cranial nerve. The treatment includes microsurgery, stereotactic radiotherapy and conservative management of tumours with periodic radiological tests.

Methods

This was a retrospective study of patients with VS following conservative management in a tertiary hospital between 1993 and 2013. A total of 73 patients were enrolled in our protocol. The mean age at diagnosis was 59.7 years. The average size was 11.9mm (4–27mm); 58.9% of the tumours were intracanalicular and 41.1%, extracanalicular. The mean follow-up period was 35.75 months.

Results

In 87.7% of patients there was no evidence of tumour growth. A total of 9 tumours (12.3%) increased in size. The average growth rate was 0.62mm/year. The percentage of extracanalicular tumours that grew (20%) was higher than that of intracanalicular tumours (7%). Seven patients (9.5%) experienced significant changes in their symptoms and 6 of these (8.2%) experienced a loss of useful hearing. Six patients (8.2%) left follow-up and underwent surgery.

Conclusions

Periodic monitoring of vestibular schwannomas with magnetic resonance imaging represents an option for management, because most small tumours experience little or no growth over time.

Keywords:
Vestibular schwannoma
Acoustic neuroma
Observation
Conservative management
Resumen
Introducción

El schwannoma vestibular (SV) es un tumour benigno de lento crecimiento originado en el VIII par craneal, en cuyo tratamiento entran a formar parte la microcirugía, la radioterapia estereoatáxica, y el manejo conservador de los tumores con controles radiológicos periódicos.

Material y métodos

Estudio retrospectivo de pacientes con SV siguiendo un manejo conservador en un hospital de tercer nivel entre los años 1993–2013.

Un total de 73 pacientes fueron incorporados a nuestro protocolo de seguimiento de SV. La edad media al diagnóstico fue de 59,7 años. El tamaño medio de 11,9mm (4–27mm), siendo el 58,9% intracanaliculares y el 41,1% extracanaliculares. El periodo de seguimiento medio fue de 35,75 meses.

Resultados

En el 87,7% no hubo evidencia de crecimiento tumoral. Un total de 9 (12,3%) tumores incrementaron sus dimensiones. La velocidad media de crecimiento fue de 0,62mm/año. El porcentaje de tumores extracanal que crecieron (20%) fue mayor que el de los tumores intracanal (7%). Siete pacientes experimentaron cambios significativos en su sintomatología (9,5%) y 6 de estos una pérdida de la audición útil (8,2%). Seis pacientes salieron del seguimiento y fueron intervenidos quirúrgicamente (8,2%).

Conclusión

El seguimiento del SV con controles periódicos de resonancia magnética nuclear representa una opción válida de manejo, dado que la mayoría de los tumores de pequeño tamaño experimentan poco o nulo crecimiento a lo largo del tiempo.

Palabras clave:
Schwannoma vestibular
Neurinoma del acústico
Observación
Manejo conservador

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