Age-Dependent Risk Factors for Hemorrhagic Events in Moyamoya Disease: The Role of Collateral Vessels

Area of Science:

• Neurology
• Vascular Medicine
• Radiology

Background:

• Moyamoya disease (MMD) is a rare cerebrovascular disorder characterized by progressive stenosis of the internal carotid arteries.
• Collateral circulation is crucial for maintaining cerebral blood flow in MMD, but its characteristics and association with hemorrhagic events vary between age groups.

Purpose of the Study:

• To delineate the distinct collateral artery profiles in pediatric versus adult patients with MMD.
• To identify specific collateral vessels that serve as risk factors for cerebral hemorrhagic events in different age cohorts of MMD patients.

Main Methods:

• Retrospective analysis of 298 MMD patients (pediatric and adult groups) diagnosed at Tiantan Hospital.
• Comparison of angiographic features between pediatric and adult groups.
• Logistic regression analysis to determine risk factors for cerebral hemorrhage in relation to collateral vessel prominence.

Main Results:

• Significant differences in collateral artery prominence were observed between pediatric and adult MMD groups, with adults showing more prominent superficial temporal and middle meningeal arteries (MMA).
• In pediatric MMD, prominent superficial temporal artery, MMA, posterior choroidal artery, and middle cerebral artery were associated with hemorrhagic hemispheres.
• In adult MMD, prominent superficial temporal artery, MMA, and middle cerebral artery were linked to hemorrhagic hemispheres; MMA was identified as a predictor.

Conclusions:

• Age-related differences exist in the collateral artery patterns of moyamoya disease.
• The middle meningeal artery (MMA) is a significant predictor of cerebral hemorrhage in adult MMD patients.
• The posterior choroidal artery is a risk factor for cerebral hemorrhage in pediatric MMD patients.