PCOM aneurysm rupture with predominant IVH

Findings:

Axial noncontrast CT images demonstrate massive intraventricular hemorrhage with ventricular catheter in place. There is superimposed subarachnoid hemorrhage. Along the medial margin of a suspected component of left temporal lobe hemorrhage, there is an irregular focus of isodensity, which represents the bilobed ruptured left posterior communicating aneurysm as confirmed on CTA.

Discussion/Differential Diagnosis:

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