title: Anterior communicating artery aneurysm in the sella turcica: case report.
abstract: BACKGROUND
  Only 3 such reported intrasellar aneurysms have arisen from the anterior communicating artery.
  
  
  METHODS
  A neurologically normal 38-year-old man complaining of headache underwent cranial magnetic resonance imaging, which showed a heterogeneously enhancing, partially calcified intrasellar mass. The normal pituitary gland was identified at the bottom of the sella, and the optic chiasm was located superior to the aneurysm. Digital subtraction angiography and three-dimensional computed tomography angiography demonstrated the mass to be a partially thrombosed anterior communicating artery aneurysm. Frontotemporal craniotomy was performed, but initial attempts to occlude the neck of the aneurysm were unsuccessful. We could not expose the dome of the aneurysm or confirm the anatomic relationship of the pituitary to the aneurysm. The patient declined further intervention, and close follow-up has been maintained.
  
  
  CONCLUSIONS
  Our case suggested that unlike intrasellar aneurysms arising from the internal carotid artery, intrasellar aneurysms originating from the anterior communicating artery are likely to present difficulty in dissecting the neck of the aneurysm from the bilateral optic nerves and pituitary stalk, impeding direct aneurysm clipping. When we operated upon a patient with a large unruptured intrasellar aneurysm originating from the anterior communicating artery via the prechiasmatic space, we encountered considerable technical difficulty.
authors.affiliation: Department of Neurosurgery, Nippon Medical School, Chiba Hokusoh Hospital, Chiba, Japan.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Murai
authors.forename: Shiro
authors.initials: S
authors.lastname: Kobayashi
authors.forename: Takayuki
authors.initials: T
authors.lastname: Mizunari
authors.forename: Akira
authors.initials: A
authors.lastname: Teramoto
mesh_terms: D000328:Adult; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D008297:Male; D011859:Radiography; D012658:Sella Turcica / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery