The Surgical Treatment of a Large Cortical Atherosclerotic Middle Cerebral Artery Aneurysm Presenting With Parietal Lobe Infarction.

Distal MCA aneurysms are rarely seen in daily neurosurgical practice and they are, more commonly associated with infectious processes. Here, the authors present a 65-year-old, patient who had an atherosclerotic M4 segment located aneurysm. It was confirmed, that the aneurysm was not related with any infectious process. The patient had, presented clinically by a parietal infarction and she had been successfully operated. The neuronavigation system for this particular case aided us for a precise localization of the aneurysm and gave a chance for a smaller craniotomy.