PRET: Patients Prone to Recurrence After Endovascular Treatment

Inclusion Criteria

• •All patients presenting at least one aneurysm 'prone to recurrence after endovascular treatment' (PRET), defined for the sake of this study as:
• •* PRET-1: One ruptured or unruptured aneurysm, never treated, with a dimension ≥10mm (longest axis, including thrombosed portions of large or giant aneurysms); for ruptured lesions, patients should be in WFNS grade I, II or III.
• •* PRET-2: an Aneurysm presenting a major recurrence after previous coiling; and judged by the neurovascular team to require elective treatment.
• •The anatomy of the lesion is such that endovascular treatment is possible with both types of coils (not necessarily certain or probable)
• •The endovascular physician is content to use either type of coils (platinum or hydrogel-coated coils) but no other type of coils
• •Patient is 18 or older
• •Life expectancy is more than 2 years