恶性外耳道炎的影像学表现  

Imaging features of malignant external otitis

作　　者：张佩佩 袁建华[2] 丁忠祥[2] 李玉梅[2] 陈方宏[2] 张福兴[3] 

机构地区：[1]岱山县人民医院放射科,浙江岱山316200 [2]浙江省人民医院放射科 [3]新加坡国立大学医院放射科

出　　处：《实用放射学杂志》2014年第10期1634-1637,共4页Journal of Practical Radiology

摘　　要：目的：探讨CT和 MRI在诊断恶性外耳道炎及显示病变范围中的价值。方法收集10例临床确诊恶性外耳道炎患者的临床及影像学资料，并对其进行分析、总结。10例患者均进行过耳部平扫及增强 CT 检查，其中6例同时进行了 MRI 检查。结果10例患者耳部CT扫描均显示患侧外耳道内异常软组织影，其中7例伴有外耳道骨皮质破坏，其他CT表现包括颅底骨质破坏及颅内侵犯。6例耳部 MRI对外耳道异常软组织、乳突积液显示较好，对骨髓病变也显示较好，但对骨皮质破坏的显示率较低。结论 CT及 MRI对外耳道异常软组织、颅底骨质破坏及颅内病变的显示对诊断恶性外耳道炎及勾画病变范围具有重要的价值。Objective To explore the value of computed tomography （CT）and magnetic resonance imaging （MRI）in the diagno-sis and delineation of the extent of malignant external otitis （MEO）.Methods Clinical manifestations and imaging features of 10 pa-tients with definite diagnosis of MEO were collected and analyzed.Plain and contrast-enhanced CT of the ear were performed on all 10 patients,of which 6 patients also received MRI scans.Results Abnormal soft tissue opacity within the external auditory canal and involvement of surrounding structures were found in all 10 patients.Bone erosion of the external auditory canal was showed in 7 pa-tients.Other CT findings included bone erosion of skull base and intracranial involvement.Abnormal soft tissue of the external audi-tory canal,effusion in the mastoid cavity and medullary abnormalities were showed very well on MR images in 6 patients while the cortical bone erosion was not well showed.Conclusion Imaging features of the lesions in the external auditory canal,bone erosion of skull base and intracranial involvement play crucial roles in the diagnosis and delineation of the extent of the lesion in patients with MEO.

关 键 词：恶性外耳道炎 计算机体层成像 磁共振成像 

分 类 号：R764.11[医药卫生—耳鼻咽喉科] R445.2[医药卫生—临床医学]