Brain arteriovenous malformations in adults.

Area of Science:

• Neurology
• Neurosurgery
• Radiology

Background:

• Arteriovenous malformations of the brain (AMB) are vascular anomalies that can lead to cerebrovascular events like stroke.
• Approximately 50% of patients with AMB present with hemorrhage, while the remainder experience non-focal symptoms (headache, seizure) or are asymptomatic, with incidental findings.
• The management of AMB is a complex, interdisciplinary challenge focused on preventing hemorrhage.

Purpose of the Study:

• To review the current understanding of arteriovenous malformations of the brain.
• To highlight the challenges in treating AMB and the need for evidence-based approaches.
• To emphasize the limited research on risk-benefit ratios for treating unruptured AMB.

Main Methods:

• Review of epidemiological and imaging research on arteriovenous malformations of the brain.
• Analysis of presentation patterns, including hemorrhage and non-focal symptoms.
• Assessment of the current treatment landscape and research gaps.

Main Results:

• AMB present with hemorrhage in about 50% of cases.
• The other 50% of AMB patients present with non-focal symptoms or are asymptomatic.
• Significant resources are dedicated to AMB treatment, yet robust data on unruptured lesions is scarce.

Conclusions:

• Arteriovenous malformations of the brain represent a significant cause of stroke.
• Further research is critically needed to establish risk-benefit profiles for interventions on unruptured AMB.
• Developing optimal, evidence-based treatment strategies for all AMB presentations remains a key challenge.