Nikolaidis Vasilios, Malliari Hariklia, Psifidis Dimosthenis, Metaxas Spyridon
2nd Department of Otolaryngology, Aristotle University,, Papageorgiou G,H,, Thessaloniki, Greece.
BMC Ear Nose Throat Disord. 2010 Apr 5;10:4. doi: 10.1186/1472-6815-10-4.
Cholesterol granuloma (CG) may involve the middle ear, the mastoid bone and the petrous apex. However, CG presenting as a mass obstructing the external ear canal (EEC) is relatively rare and it can be a diagnostic challenge.
We report a case of a CG occupying the mastoid antrum and presenting as a mass into the EEC. Temporal bone computerized tomography showed a soft tissue mass which eroded the posterior-superior bony wall of the EEC. On magnetic resonance imaging, the mass revealed a high signal on both T1 and T2-weighted images. The CG was removed by a mastoidectomy procedure and the histopathologic report confirmed the diagnosis of CG. A type III tympanoplasty was performed.
The postoperative course was uneventful.
胆固醇肉芽肿（CG）可累及中耳、乳突骨和岩尖。然而，CG表现为阻塞外耳道（EEC）的肿块相对少见，且可能是一个诊断难题。
我们报告一例CG占据乳突窦并表现为突入EEC的肿块。颞骨计算机断层扫描显示一个软组织肿块，侵蚀了EEC的后上骨质壁。在磁共振成像上，该肿块在T1加权和T2加权图像上均显示高信号。通过乳突切除术切除了CG，组织病理学报告证实了CG的诊断。进行了III型鼓室成形术。
术后过程顺利。
