title: Ruptured Total Intrameatal Anterior Inferior Cerebellar Artery Aneurysm.
abstract: Among the distal anterior inferior cerebellar artery (AICA) aneurysms, a unique aneurysm at the meatal loop inside the internal auditory meatus is extremely rare. The authors report a case of surgically treated total intrameatal AICA aneurysm. A 62-year-old female patient presenting with sudden bursting headache and neck pain was transferred to our department. Computed tomography and digital subtraction angiography showed subarachnoid hemorrhage at the basal, prepontine cistern and an aneurysm of the distal anterior inferior cerebellar artery inside the internal auditory meatus. Surgery was performed by retrosigmoid craniotomy with unroofing of the internal auditory meatus. The aneurysm was identified between the seventh and eighth cranial nerve in the meatus and was removed from the canal and clipped with a small straight Sugita clip. After operation the patient experienced transient facial paresis and tinnitus but improved during follow up.
authors.affiliation: Department of Neurosurgery, Sacred Heart Hospital, College of Medicine, Hallym University, Anyang, Korea.
authors.forename: Hyung Cheol
authors.initials: HC
authors.lastname: Kim
authors.affiliation: Department of Neurosurgery, Sacred Heart Hospital, College of Medicine, Hallym University, Anyang, Korea.
authors.forename: In Bok
authors.initials: IB
authors.lastname: Chang
authors.affiliation: Department of Neurosurgery, Kangnam Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Korea.
authors.forename: Ho Kook
authors.initials: HK
authors.lastname: Lee
authors.affiliation: Department of Neurosurgery, Sacred Heart Hospital, College of Medicine, Hallym University, Anyang, Korea.
authors.forename: Joon Ho
authors.initials: JH
authors.lastname: Song
keywords: Facial nerve; Intrameatal AICA aneurysm; Microsurgery; Vestibular nerve