par Abeloos, Laurence 
;Levivier, Marc ;Devriendt, Daniel ;Massager, Nicolas
Référence Stereotactic and functional neurosurgery, 85, 6, page (303-306)
Publication Publié, 2007-10
;Levivier, Marc ;Devriendt, Daniel ;Massager, Nicolas Référence Stereotactic and functional neurosurgery, 85, 6, page (303-306)
Publication Publié, 2007-10
Article révisé par les pairs
| Résumé : | Gamma knife radiosurgery is a safe and effective treatment for cavernous sinus meningioma, associated with a very low morbidity. However, a high dose of radiation could lead to modifications of the vascular wall such as in radiosurgical treatment of arteriovenous malformations. We present a patient treated by gamma knife radiosurgery for a left cavernous sinus meningioma using a margin dose of 13 Gy at the 50% isodose. A complete occlusion of the intracavernous segment of the ICA occurred during the follow-up, in combination with a regression of the meningioma volume. The patient sustained no neurological deficit. We found that a hot spot of dose was administered to the intracavernous segment of the internal carotid artery, with a maximum dose of 22.3 Gy. Dose heterogeneity inside the target volume can produce hot spots of dose inside the internal carotid artery that can lead to a vascular occlusion. Therefore, we recommend shifting the hot spot during the dosimetry planning in order to reduce the incidence of such vascular injury. |
