Expansile bone cyst and cholesteatoma of the temporal bone.
OBJECTIVE
To identify primary bony cysts of the temporal bone.


METHODS
A single case of a woman presenting with unilateral bulging of the temporoparietal cranium, progressive stenosis of the external auditory canal, and maximal conductive hearing loss.


METHODS
Plain x-rays, magnetic resonance imaging, contrast-enhanced computed tomography, audiogram, and modified radical mastoidectomy.


METHODS
Radiologic and histopathologic diagnosis of a primary bone cyst of the temporal bone obstructing the external auditory canal with a retained cholesteatoma of the middle ear.


RESULTS
Identification of an inflammatory bony cyst of the temporal bone with a retained cholesteatoma of the middle ear resulting in stenosis of the external auditory canal and maximal conductive hearing loss.


CONCLUSIONS
Primary bone cyst of the temporal bone can lead to external auditory canal stenosis, middle ear cholesteatoma, and conductive hearing loss.
Hwang
Harry S
HS
Department of Otolaryngology-Head & Neck Surgery, University of California, San Francisco, California, USA. hhwang@ohns.ucsf.edu
Glastonbury
Christine M
CM
Grenert
James P
JP
Lustig
Lawrence R
LR
D000328:Adult; D001345:Autoradiography; D001847:Bone Diseases / Q000150:complications / Q000473:pathology* / Q000601:surgery; D002781:Cholesteatoma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D003560:Cysts / Q000150:complications / Q000473:pathology* / Q000601:surgery; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D013506:Otologic Surgical Procedures; D013701:Temporal Bone / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed