What is Cerebral arteriovenous malformation?
{{Infobox medical condition | name = Cerebral arteriovenous malformation | image = AVM grossly.jpg | caption = Large arteriovenous malformation of the parietal lobe | symptoms = Headache, seizures, other | complications = Intracranial hemorrhage, stroke | onset = | duration = Until repaired | types = | causes = Genetic | risks = | diagnosis = | differential = Other cerebral vascular malformations, Cerebral Proliferative Angiopathy, Vascular Tumor, Glioblastoma | prevention = None known | treatment = Endovascular embolization, open surgery (resection), Stereotactic radiosurgery | medication = | prognosis = | frequency = | deaths = }} A '''cerebral arteriovenous malformation''' ('''cerebral AVM''', '''CAVM''', '''cAVM''') is a rare connection between the [[artery|arteries]] and [[vein]]s in the [[human brain|brain]]. It is an [[arteriovenous malformation]] in the [[cerebrum]]. In serious cases, the blood vessels rupture and there is bleeding within the brain ([[intracranial hemorrhage]]). In more than half of patients with AVM, hemorrhage is the first [[symptom]].<ref>{{Cite journal|last1=Perret|first1=G.|last2=Nishioka|first2=H.|date=1966-10-01|title=Report on the cooperative study of intracranial aneurysms and subarachnoid hemorrhage. Section VI. Arteriovenous malformations. An analysis of 545 cases of cranio-cerebral arteriovenous malformations and fistulae reported to the cooperative study|url=https://archive.org/details/sim_journal-of-neurosurgery_1966-10_25_4/page/467|journal=Journal of Neurosurgery|volume=25|issue=4|pages=467–490|doi=10.3171/jns.1966.25.4.0467|issn=0022-3085|pmid=5925721}}</ref> The most problems related to an AVM, are [[headache]]s and [[seizure]]s, [[cranial nerve]] deficits,<ref>{{Cite web|url=http://surgicalneurologyint.com/surgicalint-articles/oculomotor-neuropathy-from-an-unruptured-arteriovenous-malformation-in-the-frontal-operculum-a-case-report-2/|titl