Study of asymptomatic(silent)hemorrhaging in patients with unrup-tured cerebral aneurysms

Toshinori Matsuzaki, Isao Akasu, Masahiro Tanaka, Yusuke Sasaki, Kota Yamakawa, Ryo Kitagawa, Hirotaka Yoshida, Jun Sakai, Shinichi Numazawa, Yasunobu Itoh, Sadayoshi Watanabe, Takuji Yamamoto, Terushige Toyooka, Kojiro Wada, Kentaro Mori

Research output: Contribution to journalArticlepeer-review


Among 300 consecutive cases of clipped unruptured cerebral aneurysms, asymptomatic(silent)hemor-rhaging was detected intraoperatively in 8 cases(2.7%). The aneurysms with silent hemorrhaging were smaller(mean maximum diameter:5.4 mm)and exhibited a lower bleb detection rate on preoperative 3D‒ CT angiography(25%). In multivariate analysis, aneurysmal size and hypertension demonstrated trends towards significant associations with silent rupturing. Therefore, aneurysms with silent hemorrhagic bleb (blister)tend to cause minor leaks, which are hard to detect on preoperative 3D‒CT angiography.

Original languageEnglish
Pages (from-to)224-229
Number of pages6
JournalJapanese Journal of Neurosurgery
Issue number3
Publication statusPublished - 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Surgery
  • Clinical Neurology


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