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Table 1: 
Vascular ICH etiologies identified by MDCTA
Etiology Retrospective Cohort (n = 91) Prospective Cohort (n = 29) All Patients (n = 120)
No. % No. % No. %
AVM 40 44 15 51.7 55 45.8
Aneurysm 21^a 23 5 17.2 26^a 21.7
DVST 17 18.7 3 10.3 20 16.7
AVF 8 8.8 3 10.3 11 9.2
Vasculopathy 3 3.3 1^b 3.5 4^b 3.3
Moyamoya 2 2.2 2 7 4 3.3


a Includes 3 pseudoaneurysms.


b Includes a patient in whom vasculitis led to pseudoaneurysm formation and rupture.