Cerebral Arteriovenous Malformation (AVM): Left Untreated, It Can Be Life-Threatening!
(Cerebral Arteriovenous Malformation)
Cerebral arteriovenous malformation (AVM) is a congenital vascular disorder characterized by an abnormal tangle of connections between arteries and veins in the brain. It is more prevalent in males than in females. Although relatively rare, AVM is a high-risk condition because patients are often diagnosed only after severe complications—most notably intracranial hemorrhage—have already occurred.
Symptoms of Cerebral Arteriovenous Malformation
Although AVM is a congenital anomaly, clinical manifestations typically emerge after the age of 15 as the vascular lesion progressively enlarges. Symptoms vary among individuals depending on the size and anatomical location of the malformation, resulting from either vascular rupture or mechanical compression of adjacent brain tissue. Common presentations include:
- Severe headache
- Dizziness and loss of balance
- Nausea and vomiting
- Seizures
- Muscle weakness or numbness
- Lethargy, confusion, or altered mental status
- Visual disturbances or vision loss
- Difficulty speaking (dysarthria)
- Aphasia or loss of communication ability
- Cognitive, memory, learning, or behavioral changes
Diagnosis of Cerebral Arteriovenous Malformation
Physicians perform a thorough medical history and neurological physical examination, alongside specialized diagnostic imaging and modalities to confirm the diagnosis and formulate a targeted treatment plan, including:
- Cerebral angiography (Cerebral arteriography)
- Brain Computed Tomography (CT Scan) with CT Angiography (CTA)
- Brain Magnetic Resonance Imaging (MRI)
- Magnetic Resonance Angiography (MRA)
- Electroencephalography (EEG) in patients presenting with seizures
Treatment Options for Cerebral Arteriovenous Malformation
Treatment strategies are tailored to the individual patient, determined by factors such as lesion size, anatomical location, clinical symptoms, age, and underlying comorbidities. In many cases, a multimodal approach combining several therapeutic techniques is required:
- Endovascular Embolization: A minimally invasive catheterization technique where a microcatheter is guided through the vascular system to the nidus of the AVM, deploying embolic agents, microcoils, medical glue, or detachable balloons to occlude the abnormal vessels.
- Surgical Resection: Microsurgical removal of the malformed vascular tangle, best suited for superficial and surgically accessible lesions.
- Stereotactic Radiosurgery: Delivery of targeted high-energy radiation beams directly to the malformation, inducing progressive vascular thrombosis and shrinkage of the lesion. This modality is commonly utilized for small, deep-seated, or surgically inaccessible AVMs.
