Multimodal Biocollection Linked to the French Register of Intracranial Aneurysms

Inclusion Criteria

• •Any adult patient consulting for a definite and typical bifurcation AIC authenticated on MRI and/or cerebral arteriography
• •Aneurysm discovered less than a year ago, with initial imaging (MRI and/or CTA and DSA) available
• •Written consent obtained for study participation
• •Patient covered by a social security plan
• •Index case: Any adult patient consulting for a definite and typical bifurcation ICA presenting at least one other case with ICA related (child, parent, brother, sister) detected by MRI with at least one Time of Flight (TOF) sequence.
• •Family relatives: children, parents, brothers, sisters, of legal age, of patients with a family history of definite, typical bifurcation AIC (≥ 4 affected), Screening to be performed using MRI with at least a Time of Flight (TOF) sequence.
• •Written consent to participate in the study
• •Patient and relatives covered by a social security plan