Stereotactic and Functional Neurosurgery
Case Report
Internal Carotid Occlusion following Gamma Knife Radiosurgery for Cavernous Sinus MeningiomaAbeloos L.a, b · Levivier M.a, b · Devriendt D.b · Massager N.a, baDepartement of Neurosurgery and bGamma Knife Center, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
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Article / Publication Details
Received: February 05, 2007
Accepted: March 15, 2007
Published online: August 17, 2007
Issue release date: October 2007
Number of Print Pages: 4
Number of Figures: 2
Number of Tables: 0
ISSN: 1011-6125 (Print)
eISSN: 1423-0372 (Online)
For additional information: https://www.karger.com/SFN
Abstract
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.
© 2007 S. Karger AG, Basel
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Article / Publication Details
Received: February 05, 2007
Accepted: March 15, 2007
Published online: August 17, 2007
Issue release date: October 2007
Number of Print Pages: 4
Number of Figures: 2
Number of Tables: 0
ISSN: 1011-6125 (Print)
eISSN: 1423-0372 (Online)
For additional information: https://www.karger.com/SFN
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