Coil Embolization of Cerebral Tiny Aneurysms

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  • Kuroiwa Terumasa
    Division of Neuroendovascular Therapy, Kozenkai Yagi Neurosurgical Hospital, Osaka, Japan
  • Shimizu Fuminori
    Department of Neurosurgery, Seijinkai Shimizu Hospital, Osaka, Japan
  • Yamashita Taro
    Department of Neurosurgery, Seijinkai Shimizu Hospital, Osaka, Japan
  • Hiramatsu Ryo
    Department of Neurosurgery and Neuroendovascular Therapy, Osaka Medical College, Osaka, Japan
  • Yagi Ryokichi
    Department of Neurosurgery and Neuroendovascular Therapy, Osaka Medical College, Osaka, Japan
  • Kimura Seigo
    Department of Neurosurgery, Kozenkai Yagi Neurosurgical Hospital, Osaka, Japan
  • Yamada Yoshitaka
    Department of Neurosurgery, Nishinomiya Kyoritsu Neurosurgical Hospital, Osaka, Japan
  • Yamada Makoto
    Department of Neurosurgery, Takeda General Hospital, Osaka, Japan

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<p>Purpose: We retrospectively examined the results of coil embolization for 28 cerebral tiny aneurysms (<3 mm), 73 small cerebral aneurysms (3–4 mm) and associated complications.</p><p>Subjects and Methods: From a total of 418 patients who underwent coil embolization of cerebral aneurysms (n = 433) between January 2008 and August 2015, we analyzed 28 cerebral tiny aneurysms (6.5%) and 73 small aneurysms (16.9%). The type of procedure, results of embolization, and complications were compared.</p><p>Results: For 23 (82.1%) of the 28 tiny aneurysms and 52 (71.2%) of the 73 small aneurysms, embolization was performed using a simple technique. Embolization resulted in complete obliteration (CO) and neck remnant (NR) in 26 (92.9%) of the 28 tiny aneurysms, and CO + NR was achieved in 62 (84.9%) of the 73 small aneurysms. Treatment was discontinued for one tiny aneurysm and one small aneurysm. Intraoperative rupture occurred in one tiny aneurysm and three small aneurysms. Thromboembolism was observed in one tiny aneurysm and one small aneurysm. Morbidity was encountered in one tiny aneurysm (thromboembolism), and mortality was associated with another tiny aneurysm (intraoperative rupture).</p><p>Conclusion: The results of coil embolization for tiny aneurysms were similar to those of small aneurysms. Coil embolization-related complications and prognosis were also considered to be similar.</p>

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