TY - JOUR T1 - Immediate Shrinkage of Optociliary Shunt Vessels after Fractionated External Beam Radiation for Meningioma of the Optic Nerve Sheath JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1360 LP - 1362 DO - 10.3174/ajnr.A1063 VL - 29 IS - 7 AU - A.G. de Alba Campomanes AU - D.A. Larson AU - J.C. Horton Y1 - 2008/08/01 UR - http://www.ajnr.org/content/29/7/1360.abstract N2 - SUMMARY: Fractionated stereotactic radiation has become the standard treatment of meningioma of the optic nerve sheath. The mechanism responsible for improvement in visual function is unclear, because neuroimaging after treatment usually shows no discernable change in tumor appearance. We report immediate regression of optociliary shunt vessels in a patient after radiation treatment of an optic nerve sheath meningioma. This observation indicates that radiation treatment can cause rapid reduction of optic nerve compression, even without appreciable reduction in the size of the meningioma. ER -