Giant Petrous Segment Aneurysm Causing Facial Palsy: Case Report

Objectives: Co-occurance of aneurysm causing facial palsy by compression and fibrous dysplasia. Background: The aim of this study is to acknowledge this condition due to its rare frequency. Methods: We report a case of a 54 year old patient presenting with sporadic right hemifacial spasms, lasting up to a minute. In 2023 it evolved with facial palsy House Brackmann V and episodes of headache. Imaging investigation showed a giant petrous segment aneurysm on the right internal carotid artery, with signs of aneurysm thrombosis, compression of the internal acoustic meatus and fibrous dysplasia of the temporal bone as well as erosion in the petrous apex. In our case embolization with coils was proposed.