title: Giant aneurysm of the proximal anterior cerebral artery.
abstract: BACKGROUND
  Giant aneurysms originating from the proximal anterior cerebral artery (A1) are extremely rare. Only 12 cases have been reported previously.
  
  
  METHODS
  A case of giant A1 aneurysm, which occurred in a patient with a progressive visual loss, is presented. The previous 12 cases are reviewed and discussed. This patient was treated by trapping and decompression of the aneurysm. These aneurysms bleed very rarely; they usually present with signs and symptoms secondary to the mass effect, including visual loss and progressive dementia. Most of these aneurysms have been treated by direct trapping of the aneurysm or by occlusion of the proximal anterior cerebral artery.
  
  
  CONCLUSIONS
  In most cases, trapping and decompression of the aneurysm is the treatment of choice, since they involve a long segment of the A1 that does not allow preservation of the parent artery if direct clipping is performed.
authors.affiliation: Section of Neurosurgery, University of Puerto Rico, San Juan 00936.
authors.forename: O
authors.initials: O
authors.lastname: De Jesús
mesh_terms: D015901:Angiography, Digital Subtraction; D002533:Cerebral Angiography; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000601:surgery; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D009493:Neurosurgery / Q000379:methods