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Stab injury to the head in a 22-year-old man. A,B) Axial CT images demonstrate a right occipital penetrating injury (curved arrow) with a large amount of intraventricular hemorrhage (arrowheads) and blood along the right cerebellar trajectory (arrow). C) DSA images on the day of admission demonstrate a 1.5 mm traumatic intracranial aneurysm (TICA) (arrowhead) from a medullary loop of the right posterior inferior cerebellar artery (PICA).
