<unk> s are aneurysms of the brain vasculature which occur in small blood vessels (less than 300 micrometre diameter).<unk> s are most often located in the lenticulostriate vessels of the basal ganglia and are associated with chronic hypertension.<unk> s are a common cause of cerebral hemorrhage. Retinal microaneurysms are seen in conditions like diabetic retinopathy, HIV related retinal microangiopathy, sickle cell retinopathy, idiopathic macular telangiectasia etc. In diabetic retinopathy, due to breakdown in blood–retinal barrier, microaneurysms may leak plasma constituents into the retina, or it may thrombose.
Charcot–Bouchard aneurysm
Rasmussen's aneurysm
Cirsoid aneurysm
Pseudoaneurysm
Mycotic aneurysm
Arterial tortuosity syndrome
Capillary aneurysms
Monckeberg's arteriosclerosis