BASAL PERFORATING ARTERY ANEURYSM WITHIN THE CAVUM SEPTI PELLUCIDI - CASE-REPORT

The authors describe the case of a 16-year-old boy presenting with cli nical onset of subarachnoid hemorrhage. The patient was found to have a small aneurysm arising from the distal portion of a basal perforatin g branch of the anterior cerebral artery (ACA), lying within a cavum s epti pellueidi. Neuroimaging demonstrated a hematoma within the cavum septi pellucidi and the aneurysm was resected via a transcallosal appr oach guided by an intraoperative portable digital subtraction angiogra phy (DSA) system. The origin of the aneurysm was presumed to be idiopa thic. This report is the first to describe an aneurysm of a basal perf orating artery arising from the ACA that resulted in an intracaval hem atoma. When approaching small vascular lesions during surgery, intraop erative DSA is the method of choice to identify the precise trajectory and distance to the lesions.