• Jin Matsuura, Tadahiro Otsuka, Takashi Nakagawa, and Keitaro Kai.
• Department of Neurosurgery, National Hospital Organization Kumamoto Medical Center, Kumamoto, Japan. Electronic address: mj_1593_mj@yahoo.co.jp.
• World Neurosurg. 2018 Dec 27.

BackgroundIn many cases in which bifrontal craniotomy is performed, the frontal sinus is opened, and postoperative complications occur. Various methods to close the frontal sinus have been reported. However, all these methods require skill to perform and take time. The aim of this study was to report results obtained with closure of the frontal sinus using polymethyl methacrylate, which is a simpler method.MethodsFrom December 2008 to June 2018, 122 patients with a ruptured anterior communicating aneurysm were transported to the authors' facility, and 52 patients consecutively underwent bifrontal craniotomy with opening of the frontal sinuses, which were then filled with polymethyl methacrylate.ResultsMean follow-up period was 21.8 months; the longest follow-up was 116 months. No cerebrospinal fluid leakage or other complications were observed.ConclusionsThe method of filling the frontal sinus with polymethyl methacrylate reported in this study was safe and had no complications. This method should be considered as a method of frontal sinus closure.Copyright © 2019 Elsevier Inc. All rights reserved.

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