Redmond JG and Pattavilakom SA
This is the first documented case report of a simultaneous middle cerebral artery (MCA) aneurysmal subarachnoid hemorrhage (aSAH) and remote third ventricular clot. The occurrence of simultaneous subarachnoid hemorrhage and remote hypertensive intracerebral hemorrhage (ICH) is a rare occurrence and has only been reported three previous times in the literature. Intraventricular hemorrhage (IVH) post aneurysmal subarachnoid hemorrhage is common, where peri-ventricular intracerebral clot has ruptured the ependymal lining. However primary intraventricular hemorrhage (PIVH) without associated parenchymal clot is rare. Migration of blood via outlet foramina of the fourth ventricle through CSF pulsation and flow is thought to be the mechanism for this occurrence and would account for small volumes in the subacute setting. Here, we present a case of a 52-year-old woman with a CT demonstrated spontaneous middle cerebral artery (MCA) bifurcation aneurysmal subarachnoid hemorrhage and a large acute third ventricular clot spanning the foramen Monroe.
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