睾丸表皮样囊肿的磁共振表现及鉴别诊断  

Diagnosis and differential diagnosis of testicular epidermoid cyst with MRI

作　　者：苏峻[1] 蒋涛[1] 刘小娟[1] 翟仁友[1] 

机构地区：[1]首都医科大学附属北京朝阳医院放射科,100020

出　　处：《中华医学杂志》2014年第27期2139-2142,共4页National Medical Journal of China

摘　　要：目的 探讨睾丸表皮样囊肿的MRI表现特征及其鉴别诊断.方法 分析总结北京朝阳医院放射科2009年11月至2013年9月7例睾丸表皮样囊肿患者的MRI特征,并与睾丸精原细胞瘤进行对比分析.结果 睾丸表皮样囊肿的MRI特征性表现为,T1 WI序列部分病灶以低信号为主,中心伴灶状高信号（“靶征”）.T2WI序列部分病灶呈现高低信号交替排列（“洋葱皮征”）.增强扫描7例病灶均未强化,表现为低信号团块.结论 睾丸表皮样囊肿的特征性MRI表现有“靶征”、“洋葱皮征”,T2WI序列大部分病灶边缘有完整低信号环,增强扫描病灶均无强化.Objective To investigate the MRI characteristics and differential diagnosis of testicular epidermoid cyst.Methods The MRI imaging features of 7 testicular epidermoid cyst cases were retrospectively analyzed and compared with that of testicular seminoma.All cases were examined by contrastenhanced MRI scans.Results The group of 7 cases of testicular epidermoid cyst MRI showed characteristic：On T1-weighted MR images,some lesions showed low signal-based,center with spotty high signal （＂target sign＂）.On T2-weighted MRI,some lesions had a laminated appearance,with alternating low and high signal intensity areas （＂ onion skin＂ sign）.On contrast-enhanced images,all lesions were sharply demarcated low signal intensity masses,and contrast enhancement were not seen in any of the cases.Conclusion MRI characteristics of testicular epidermoid cyst are distinctive in certain extent It may express ＂target sign＂,＂ onion skin＂ sign,T2 low signal intensity complete rings,and without enhancement.

关 键 词：磁共振成像 睾丸肿瘤 表皮样囊肿 

分 类 号：R445.2[医药卫生—影像医学与核医学] R697[医药卫生—诊断学]