Vol. 100  No. 11 November  2007

Petrous Bone Cholesteatoma with Sudden 
Leakage of CSF: A Case Report

Atsuyoshi Asahi and Ryuki Otaka
(Asahikawa Red Cross Hospital, Asahikawa Medical College)

Taketoshi Fujita and Osamu Ohshima
(Asahikawa Red Cross Hospital)

Yasuaki Harabuchi
(Asahikawa Medical College)

    A case of petrous bone cholesteatoma with sudden leakage of cerebrospinal fluid (CSF) was encountered. An 82-year-old man complained of sudden chill and left otorrher. Computed tomography of the brain demonstrated a large area of air density in the lateral ventricles. Imaging examinations showed a tumor-like shadow, with extensive bony destruction, located in the petrous bone. Cholesteatoma was removed by a combination of lateral trans-suboccipital and trans-mastoid approaches. At surgery, the cholesteatoma was invading the pons and leakage of cerebrospinal fluid through the internal auditory canal was found. Obliteration with temporal muscle and fibrin glue was performed.

Key words : petrous bone cholesteatoma, leakage of cerebrospinal fluid, lateral trans-suboccipital approach, trans-mastoid approach, 
                     internal auditory canal

第100巻11号 目次   Vol.100 No.11 contents