The article reviews intracerebral hemorrhage caused by vascular malformations. The article also reviews incidence, prevalence, and distribution of parenchymal hemorrhage caused by aneurysms, arteriovenous malformations, and cavernous malformations are defined, and less common vascular lesions. There is a discussion of the role of cerebral vascular malformations in producing cerebral hemorrhage in young adults abusing illicit drugs.