Sullivan Anne Marie, Curtin Hugh D, Moonis Gul
Department of Radiology, CRA Medical Imaging, 5008 Brittonfield Parkway Suite 100, East Syracuse, NY 13057, USA.
Department of Radiology, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA.
Neuroimaging Clin N Am. 2019 Feb;29(1):93-102. doi: 10.1016/j.nic.2018.09.010.
The differential diagnosis of a red and/or pulsatile retrotympanic mass includes aberrant internal carotid artery, persistent stapedial artery (PSA), glomus tympanicum, and dehiscent jugular bulb. By recognizing the features of aberrant internal carotid artery and PSA on high-resolution computed tomography, these entities can be assessed by the radiologist. PSA is further classified by type because each type demonstrates a unique set of imaging features in addition to features common to all types. Although rarely encountered, it is important to reliably and consistently detect these anomalies because failure to do so can lead to disastrous surgical outcomes.
红色和/或搏动性鼓室后肿物的鉴别诊断包括颈内动脉异常、镫骨动脉持续存在（PSA）、鼓室球瘤和颈静脉球裸露。通过在高分辨率计算机断层扫描上识别颈内动脉异常和PSA的特征，放射科医生可以对这些病变进行评估。PSA还可按类型进一步分类，因为除了所有类型共有的特征外，每种类型都有一组独特的影像学特征。尽管很少遇到，但可靠且一致地检测这些异常很重要，因为未能做到这一点可能导致灾难性的手术后果。
