Fibro-Osseous Lesion of the External Auditory Canal: A Case Report

外耳道纖維骨性病症是相當罕見的。而一般較常見的骨性病症如骨瘤或外生骨疣則與其有許多的不同點。本文報告1位43歲男性患者，因右耳聽力障礙、耳部流膿且帶有血絲約半年之久，局部檢查顯示右側外耳道有一堅硬腫塊，純音聽力檢查右耳為傳導性聽力障礙，氣導聽力喪失46分貝；經電腦斷層檢查發現腫塊位於外耳道，但中耳腔無侵蝕現象，經手術施行外耳道腫塊切除，病例檢查報告為纖維骨性病變而非腫瘤，現仍持續於門診追蹤治療。此病例在臨床上較少見，文獻上亦罕見，其臨床表徵、影像學檢查及病理學報告，皆與過往常見之病變有顯著不同，且與骨性反應有相關性。因而，藉由文獻回顧提出此病例報告。

關鍵字

纖維骨性病症；外耳道；骨性反應

並列摘要

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 car. 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.

並列關鍵字

fibro-osseous lesion ； external auditory canal ； ossifying reaction

國際替代計量

Fibro-Osseous Lesion of the External Auditory Canal: A Case Report

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