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ORIGINAL ARTICLE
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Hydrocephalus after gamma knife radiosurgery for schwannoma


1 Department of Neurosurgery, Kanazawa Medical Center, Kanazawa; Department of Neurosurgery, Toyama City Hospital, Toyama, Japan
2 Department of Neurosurgery, Toyama City Hospital, Toyama, Japan

Correspondence Address:
Yu Shimizu,
Department of Neurosurgery, Kanazawa Medical Center, 1-1 Shimoishibikimachi, Kanazawa 920-8650
Japan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ajns.AJNS_278_18

Objective: Gamma Knife radiosurgery (GKRS) has been established as an effective and safe treatment for intracranial Schwannoma. However, communicating hydrocephalus can occur after GKRS. The risk factors of this disorder are not yet fully understood. The objective of the study was to assess potential risk factors for hydrocephalus after GKRS. Methods: We retrospectively reviewed the medical radiosurgical records of 92 patients who underwent GKRS to treat intracranial Schwannoma and developed communicating hydrocephalus. The following parameters were analyzed as potential risk factors for hydrocephalus after GKRS: age, sex, target volume, irradiation dose, prior tumor resection, treatment technique, tumor enhancement pattern, and protein level of cerebrospinal fluid (CSF) after GKRS. Results: Of the 92 patients, eight of them developed communicating hydrocephalus. Target volume and tumor enhancement pattern, and protein level of CSF ware associated with the development of hydrocephalus. Conclusion: In particular, patients with intracranial Schwannomas with large tumor size, ring enhancement patterns, and high protein level of CSF should be carefully observed.


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    -  Shimizu Y
    -  Miyamori T
    -  Yamano J
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