Fibro-osseous lesion of the external auditory canal: a case report.
The aim of this study was to differentiate a novel type of benign circumscribed bone lesion of the external auditory canal from lesions described previously, such as exostoses and osteomas. We present a 43-year-old male patient who suffered from ear discharge of the right ear. Local findings showed bloody discharge from his right auditory canal, which was occupied by a mass-like tissue. Computerized tomography (CT) carried out before resection of the lesion disclosed the absence of a bony connection to the underlying structures. The pathologic findings showed lesions consisting of an osteoma-like bone formation with sparse osteoblastic areas. Mature lamellar bone and bone marrow containing adipose tissue were also noted. There was no evidence of a relationship to the cartilaginous tissue or bony structures of the external auditory canal. Therefore, we present this rare case and review the reported literature in which clinical, CT, surgical, and pathologic findings suggest that this lesion was unlike those previously known, and may be related to ossifying reactions in other parts of the organism.
Department of Otolaryngology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
Hung-Pin
HP
Chi
Kuen-Yao
KY
Ho
Kun-Bow
KB
Tsai
Ka-Wo
KW
Lee
Chih-Feng
CF
Ta
Ling-Feng
LF
Wang
Wen-Rei
WR
Kuo
D000328:Adult; D003937:Diagnosis, Differential; D004424:Ear Canal / Q000473:pathology* / Q000601:surgery; D005096:Exostoses / Q000175:diagnosis; D006801:Humans; D008297:Male; D010016:Osteoma / Q000175:diagnosis; D010032:Otitis Externa / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed