Intracranial aneurysm and arachnoid cyst: just a coincidence? A case report

Sao Paulo Med J. 2019 Jan-Feb;137(1):92-95. doi: 10.1590/1516-3180.2017.0083290517. Epub 2017 Dec 18.


Context: Presence of an arachnoid cyst and a non-ruptured intracystic brain aneurysm is extremely rare. The aim of this paper was to describe a case of a patient with an arachnoid cyst and a non-ruptured aneurysm inside it. Clinical, surgical and radiological data were analyzed and the literature was reviewed.

Case report: A patient complained of chronic headache. She was diagnosed as having a temporal arachnoid cyst and a non-ruptured middle cerebral artery aneurysm inside it. Surgery was performed to clip the aneurysm and fenestrate the cyst.

Conclusions: This report raises awareness about the importance of intracranial vascular investigation in patients with arachnoid cysts and brain hemorrhage.

Publication types

  • Case Reports
  • Review

MeSH terms

  • Arachnoid Cysts / diagnostic imaging*
  • Arachnoid Cysts / surgery
  • Cerebral Angiography
  • Female
  • Humans
  • Intracranial Aneurysm / diagnostic imaging*
  • Intracranial Aneurysm / surgery
  • Magnetic Resonance Imaging
  • Middle Aged
  • Middle Cerebral Artery / diagnostic imaging*
  • Middle Cerebral Artery / surgery