Vol.100 No.7 contentsPRACTICA OTO-RHINO-LARYNGOLOGICA
Vol. 100 No. 7 Jury 2007
Congenital External Auditory Canal Stenosis: A Serious
Disease Leading to Destruction of the Mastoid Cavity
-Its Diagnosis and Treatment-
Hideo Yamane, Masahiro Takayama, Kishiko Sunami, Rie Tochino,
Mikihito Morinaka, Michiko Kojima and Kuniko Nakamura
(Osaka City University Graduate School of Medicine)
Congenital external auditory canal stenosis (CAS) is usually considered one of the slight malformations related to congenital external auditory canal atresia (CAA). However, the clinical symptoms caused by the slight malformation may not be mild. Destructive external ear canal cholesteatoma commonly occurs in CAS, but is infreguent in CAA. For several reasons CAS tends to receive an inappropriately low estimate of risk compared to that for CAA. The other malformations accompanying CAS and CAA such as microtia confound the decision regarding future treatment for doctors as well as for the patients themselves. A consensus regarding the clinical entity of CAS is required among doctors not only in otorhinolaryngology but also in relevant fields such as pediatrics and plastic surgery. These two malformations, the pathological conditions and clinical treatment of CAS and CAA should be considered separately.
Key words : congenital external auditory canal stenosis, congenital external auditory canal
atresia, external ear canal cholesteatoma, surgery