Inflammatory internal carotid aneurysm detected in a patient with benign fibro-osseous lesion in the maxillary sinus: A rare case report

Occurrences of aneurysm caused by intraoral inflammation or infection are very rare. Osseous dysplasias (ODs), the most common fibro-osseous lesions (FOLs), occur in the jaw. However, osseous lesion very rarely occurs in association with impacted tooth. We present here the case of a 22-year-old female who developed aneurysm in the cavernous region of the internal carotid artery (ICA) because of the infection of the maxillary OD with impacted and semi-impacted teeth. The aneurysm was later confirmed by contrast enhanced magnetic resonance imaging (MRI). The ICA trapping was performed under general anesthesia, and postoperative magnetic resonance angiography (MRA) confirmed disappearance of aneurysm. Approximately 2 months after the surgery, we performed left maxilla tumor excision under general anesthesia; the patient showed satisfactory progress after the excision. Since inflammation/infection of the maxilla may lead to aneurysm as found in this case, we recommend physicians to pay serious attention in such cases to prevent rupture of aneurysm.