The cerebral arteriovenous malformations correspond to the formation of an entanglement of morphologically abnormal vessels called nidus, which shunt the blood circulation directly from the arterial circulation to the venous circulation.
The cerebral arteriovenous malformations are an important cause of hemorrhagic stroke.
The hypothesis is that cerebral haemorrhage associated with a cerebral arteriovenous malformations would come from peri-nidal micro-vessels, in connection with infiltration of leucocytes and / or defective maintenance of microvascular integrity by platelets.
Patient over 18 years old
Patient with a cerebral AVM for which an intervention (endovascular treatment or surgery) or only clinical monitoring
Express consent to participate in the study
children
Patient benefiting from a legal protection measure
Pregnant or breast feeding woman