Giant internal carotid artery aneurysm at lacerum segment: A case report.

Giant aneurysms are those with a diameter of 25 mm or more and often manifest themselves in mass-effect symptoms. It is a rare condition, with older adults being those with highest incidence, although younger patients are not exempt. We present the case of a 20-year-old woman with history of type 1 Diabetes Mellitus, who manifests nonspecific symptoms, evolving to severe headaches and right hemiparesis. By imaging, a partially thrombosed giant aneurysm in the left internal carotid artery (ICA) starting at the lacerum segment was found, which. Treatment included partial resection using an anterior cervical approach with a left frontoparietotemporal craniectomy, as well as closure of the left common carotid artery. We provide detailed clinical characteristics, diagnostic procedures and radiologic imaging, as well as treatment and follow-up.