MR perfusion imaging in proliferative angiopathy.

Area of Science:

• Neurology
• Radiology
• Neuroimaging

Background:

• Seizures are a common and challenging manifestation of cerebral arteriovenous malformations (CAVM).
• Understanding the pathophysiology of specific CAVM types, like proliferative angiopathy, is crucial for effective management.
• Medical control of seizures associated with CAVMs can be difficult.

Purpose of the Study:

• To utilize perfusion-weighted imaging (PWI) to detect abnormal cerebral areas in proliferative angiopathy.
• To correlate PWI findings with clinical data in patients experiencing seizures.
• To investigate the underlying pathophysiology of proliferative angiopathy using hemodynamic parameters.

Main Methods:

• Seven patients with proliferative angiopathy and language-disturbing seizures underwent perfusion-weighted imaging (PWI).
• A bolus injection of contrast medium was administered for PWI acquisition.
• Perfusion parameters were calculated using the first-pass moment theory.

Main Results:

• Five patients exhibited abnormal perimalformative and/or contralateral areas with relative hyperperfusion (increased cerebral blood volume and flow).
• Two patients presented with areas of hypoperfusion and venous congestion.
• One patient with a severe focal deficit showed no significant hemodynamic abnormality on MRI.

Conclusions:

• PWI can detect hemodynamic abnormalities in proliferative angiopathy associated with seizures.
• Relative hyperperfusion is a common finding in affected cerebral areas.
• PWI contributes to understanding the pathophysiology of CAVMs and may inform seizure management strategies.