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Abstract #2427

Impact of the topology of brain microbleeds on the structural brain network

Xiaopei Xu1, Henry KF Mak1,2, Kui-Kai Lau3, Pak Lun Lam4, and Edward S Hui1,2

1Department of Diagnostic Radiology, The University of Hong Kong, HKSAR, People's Republic of China, 2The State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, HKSAR, People's Republic of China, 3Department of Medicine, The University of Hong Kong, HKSAR, People's Republic of China, 4Li Ka Shing Faculty of Medicine, The University of Hong Kong, HKSAR, People's Republic of China

We aim to investigate the effect of the topology of brain microbleeds (BMBs), lobar (n = 32) versus deep/infratentorial (n = 31), on structural brain network in patients with TIA or first-time stroke. Our results demonstrated that the efficiency of the local and global networks of both BMB cohorts were lower compared to controls (n = 31), and that only the load of the patients with lobar BMBs was strongly associated with decrease in the efficiency of local and global networks independent of vascular risk factors. These findings suggested that lobar and deep BMBs likely have distinct pathophysiological underpinnings.

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