Prevalence: 5% of the population
Origin: Genetic/environmental, infectious (mycotic), traumatic
diseases associated with cerebral aneurysms:

  • Polycystic kidney disease
  • Marfan syndrome
  • Ehlers-Danlos syndrome
  • Pseudoxanthoma elasticum
  • Fibromuscular dysplasia
  • Sickle cell disease
  • Aortic coarctation
  • Osler–Weber–Rendu syndrome

How is a brain aneurysm diagnosed

  • By rupture producing cerebral haemorrhage (subarachnoid haemorrhage)
  • Chance finding in a MR image or CAT scan (if they are large enough to be seen)
  • By effect of the aneurysm mass:
    • Compression of cranial nerves: generally lll pc
    • Epilepsy seizures by mass effect
    • Thrombosed aneurysms with emboligenic effect

Must all aneurysms be treated?

If there is bleeding: Yes (embolisation or surgery depending on the characteristics of the aneurysm and the patient).
If it is an accidental finding: All depends on the characteristics of the aneurysm and the patient’s risk factors. In general the risk of bleeding is 1% (although it may vary depending on various risk factors).
Whether it has a mass or emboligenic effect: treatment is recommended.

clipaje quriúrgicoAneurysms can be treated by embolisation (performed by an angioradiologist) or surgical clipping (performed by a neurosurgeon). The characteristics of each aneurysm and each patient will indicate the best treatment option.