Epidermoid Cyst of Cerebellopontine Angle  

作　　者：关键[1] 

机构地区：[1]中山大学附属第一医院医学影像科,广东广州510080

出　　处：《影像诊断与介入放射学》2017年第6期504-506,共3页Diagnostic Imaging & Interventional Radiology

摘　　要：Synonyms: Epidermoid tumor,non-neoplastic inclusion cyst, congenital cholesteatoma of the cerebellopontine angle cistern.Definition: Congenital lesion arising from inclusion of ectodermal epithelial elements at time of neural tube closure during 3rd to 5th week of embryonic life, resulting in migration abnormalities of epiblastic cells.Classic imaging appearance:(1)Signal shows an insinuating cisternal lesion with low T1, high T2 close to that of cerebrospinal fluid (CSF).(2)FLAIR shows incomplete or absent attenuation.(3)Diffusion-weighted imaging shows epidermoid cyst has restricted diffusion(high-signal lesion).Other key facts:(1)3rd most common cerebellopontine angle-internal auditory canal (CPA-IAC) mass.(2)1% of all intracranial tumors.

关 键 词：Synonyms: EPIDERMOID tumor non-neoplastic INCLUSION CYST 

分 类 号：R445[医药卫生—影像医学与核医学]