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. 2011 Jul;52(7):748-52.

Surgical treatment and radiation therapy of frontal lobe meningiomas in 7 dogs

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Surgical treatment and radiation therapy of frontal lobe meningiomas in 7 dogs

Ane Uriarte et al. Can Vet J. 2011 Jul.

Abstract

The cases of 7 adult dogs with generalized seizures managed by surgical excision and radiation therapy for frontal lobe meningiomas were reviewed. The neurological examination was unremarkable in 6 of the 7 dogs. Five dogs were operated on using a bilateral transfrontal sinus approach and 2 using a unilateral sinotemporal approach to the frontal lobe. One dog was euthanized 14 d after surgery; radiation therapy was initiated 3 wk after surgery in the remaining 6 dogs. Long-term follow-up consisted of neurological examination and magnetic resonance imaging (MRI) and/or computed tomography (CT) scan after radiation therapy. The mean survival time for dogs that had surgery and radiation therapy was 18 mo after surgery. Frontal lobe meningiomas have been associated with poor prognosis. However, the surgical approaches used in these cases, combined with radiation therapy, allow a survival rate for frontal lobe meningiomas similar to that for meningiomas located over the cerebral convexities.

Traitement chirurgical et radiothérapie de méningiomes du lobe frontal chez 7 chiens. Les cas de 7 chiens adultes avec des crises d’épilepsie généralisées gérées par ablation chirurgicale et radiothérapie pour des méningiomes du lobe frontal ont été examinés. L’examen neurologique était normal chez 6 des 7 chiens. Cinq chiens ont été opérés à l’aide d’une approche par le sinus transfrontal bilatéral et 2 à l’aide d’une approche sinotemporale unilatérale du lobe frontal. Un chien a été euthanasié 14 jours après la chirurgie; la radiothérapie a été entamée 3 semaines après la chirurgie chez les autres 6 chiens. Le suivi à long terme se composait d’un examen neurologique et d’une IRM et/ou d’un tomodensitogramme après la radiothérapie. La durée moyenne de survie pour les chiens qui avaient subi la chirurgie et la radiothérapie était de 18 mois après la chirurgie. Les méningiomes du lobe frontal ont été associés à un pronostic sombre. Cette étude documente que les approches chirurgicales utilisées pour ces cas, combinées à une radiothérapie, permettent un taux de survie pour les méningiomes du lobe frontal semblable à celui des méningiomes situés sur les convexités cérébrales.

(Traduit par Isabelle Vallières)

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Figures

Figure 1
Figure 1
Frontal view of dog 4 at the bilateral transinusal approach.
Figure 2
Figure 2
Computed tomography scan after contrast injection of dog 2 before surgery.
Figure 3
Figure 3
Magnetic resonance imaging of dog 5 before surgery; T1WI after gadolinium.
Figure 4
Figure 4
A well-delimited transitional meningioma in dog 4. Hematoxylin-eosin-safran 10×.

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