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Teaching NeuroImages: Multicompartmental intracranial hemorrhage in a pediatric patient

A previously healthy 9-year-old girl presented with sudden-onset headache followed by confusion. In the emergency department, she was hypertensive, bradycardic, and no longer responsive to any stimuli. An emergent head CT scan demonstrated a left frontal intraparenchymal hematoma with intraventricular and subarachnoid extension as well as subfalcine herniation (figure). She underwent decompressive hemicraniectomy, and digital subtraction angiography confirmed a 7-mm left middle cerebral artery aneurysm (figure).