TY - JOUR T1 - Communicating Hydrocephalus after Gamma Knife Radiosurgery for Vestibular Schwannoma: An MR Imaging Study JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 992 LP - 994 DO - 10.3174/ajnr.A1379 VL - 30 IS - 5 AU - K.A. Cauley AU - B. Ratkovits AU - S.P. Braff AU - G. Linnell Y1 - 2009/05/01 UR - http://www.ajnr.org/content/30/5/992.abstract N2 - SUMMARY: Vestibular schwannomas are common, and gamma knife radiosurgery is a treatment option of symptomatic tumors. Hydrocephalus may be a complication of gamma knife treatment of vestibular schwannoma, though the cause-and-effect relationship can be debated because tumors can cause hydrocephalus without treatment. We present an MR imaging study of an unusual case of communicating hydrocephalus after gamma knife radiosurgery of a vestibular schwannoma in which the timeline of events strongly suggests that gamma knife played a contributory role in the development of hydrocephalus. We discuss risk factors for the development of hydrocephalus after radiation therapy and the role of MR CSF cine-flow study in the evaluation of treatment options for hydrocephalus in this setting. ER -