Salivary Duct Carcinoma in the External Auditory Canal Causing Ipsilateral Hearing Loss

被引:1
|
作者
Chen, Shih-Lung [1 ,2 ]
Yeh, Chi-Ju [2 ,3 ]
Chan, Kai-Chieh [1 ,2 ,4 ]
机构
[1] Chang Gung Mem Hosp, Dept Otolaryngol & Head & Neck Surg, Linkou 333, Taiwan
[2] Chang Gung Univ, Sch Med, Taoyuan 333, Taiwan
[3] Chang Gung Mem Hosp, Dept Pathol, Linkou 333, Taiwan
[4] Chang Gung Mem Hosp, Dept Otolaryngol, Linkou 333, Taiwan
关键词
salivary duct carcinoma; external auditory canal; hearing loss; androgen receptor; human epidermal growth factor receptor;
D O I
10.3390/diagnostics11081312
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background: Salivary duct carcinoma (SDC) is a rare aggressive tumor. Most tumors are not confined to the salivary ducts; rather, they invade the major and minor salivary glands. Only a few case reports on such tumors in other primary sites have appeared. Case presentation: A 40-yearold male complained of right hearing loss (a common condition), but we made an extremely rare diagnosis of an SDC in the external auditory canal (EAC). EAC cancers are frequently misdiagnosed. In our patient, the otoscope revealed a smooth, bulging subcutaneous lesion with a non-epithelial defect suggestive of a benign lesion. However, an SDC of the EAC was confirmed through pathological and immunohistochemical analysis. Conclusions: We suggest detailed evaluation of even smooth EAC subcutaneous lesions to avoid erroneous diagnoses. To the best of our knowledge, this is the first report of SDC in the EAC.
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页数:6
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