Decompressive bifrontal craniectomy for malignant intracranial pressure following anterior communicating artery aneurysm rupture: two case reports.

There are a number of causes of raised intracranial pressure (ICP) following aneurysm rupture. These include primary and diffuse hypoxic brain injury, intracranial hematomas, cerebral ischemia or infarction, and obstructive hydrocephalus. More localized brain swelling can also occur: the result of vasogenic and cytotoxic edema resulting from overlying bleeding in the subarachnoid spaces. In the case of rupture of an anterior communicating artery (ACommA) aneurysm and interhemispheric subarachnoid hemorrhage (SAH), this swelling can occur in both frontal lobes and when extensive, and the resulting intracranial hypertension can be difficult to manage with ventricular drainage and medical treatment. We describe two patients in whom decompressive bifrontal craniectomy was associated with successful ICP management and good clinical outcomes.