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Cerebral small vessel and its comprised compartments. (1): Posterior cerebral artery (2): Posterior communicating artery (3): Middle cerebral artery (4): Anterior cerebral artery (5): Anterior communicating artery (6): Internal carotid artery (7): Basilar artery. Small vessel atherosclerosis. (A). Eccentric atherosclerotic plaque in a perforating vessel in the putamen, causing significant narrowing of the lumen (asterisk).
