Penetration of the optic chiasm by a ruptured anterior communicating artery aneurysm. Case report

Isao Date, Tatsuro Akioka, Takashi Ohmoto

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There are few reports of anterior communicating artery aneurysms causing visual symptoms, and penetration of the optic chiasm by such aneurysms has not been reported. A 40-year-old man presented with the abrupt onset of left homonymous hemianopsia, right visual acuity disturbance (finger counting), and slight headache. Angiography disclosed a 7-mm anterior communicating artery aneurysm projecting inferiorly. After the neck of the aneurysm was clipped, the dome of the aneurysm was resected. The operation confirmed that the aneurysm had penetrated the fight half of the optic chiasm and the thrombosed dome had also compressed the right optic tract. Although the aneurysm was successfully clipped, the visual disturbance persisted after surgery, suggesting that the damage to the visual pathways by aneurysm penetration was irreversible in this case.

Original languageEnglish
Pages (from-to)324-326
Number of pages3
JournalJournal of Neurosurgery
Issue number2
Publication statusPublished - Aug 1997



  • Anterior communicating artery
  • Cerebral aneurysm
  • Optic chiasm

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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