MRI在腮腺良性肿瘤中的诊断价值  

MRI in the Diagnosis of benign Parotid Tumors

作　　者：程文君[1] 管青聪[2] 吴亮[1] 陈苏苏[1] 陈洁[1] 王薇[1] 

机构地区：[1]台州市立医院放射科,浙江318000 [2]南通大学,江苏在读研究生226001

出　　处：《放射学实践》2008年第7期755-758,共4页Radiologic Practice

摘　　要：目的:探讨腮腺良性肿瘤的MRI表现及其诊断价值。方法:回顾性分析23例(27个病灶)经手术病理证实的腮腺良性肿瘤患者的MRI资料,并与手术病理结果进行对照。结果:23例中多形性腺瘤9例,腺淋巴瘤8例(12个病灶),囊性淋巴管瘤3例,血管瘤、基底细胞腺瘤和脂肪瘤各1例。肿瘤大部分形态较规则,与正常腮腺组织分界清;9例多形性腺瘤中7例位于腮腺浅叶,2例位于深叶;于T_1WI上呈等信号,T_2WI上呈高信号,增强后有较明显强化。8例腺淋巴瘤在T_1WI上呈稍低信号,T_2WI上呈等低信号,增强后轻度强化。3例囊性淋巴管瘤均呈多房囊性病灶,形态不规则。1例血管瘤信号不均匀,呈明显长T_1、长T_2信号,静脉注射Gd-DTPA后病变强化明显,并可见异常增粗的血管结构。1例基底细胞腺瘤,来源于腮腺深叶,T_1WI呈欠均匀等低信号,T_2WI呈明显不均匀高信号,增强后呈轻中度强化。1例脂肪瘤在T_1WI及T_2WI上均表现为明显高信号。本组病例MRI定位和定性诊断符合率分别为95.7%和82.6%。结论:腮腺良性肿瘤的MRI表现有一定特征性,MRI在腮腺良性肿瘤的诊断和鉴别诊断中有较高的临床应用价值。Objective：To evaluate the value of MRI in the diagnosis and differential diagnosis of benign tumors in parotid space. Methods：The MRI materials of 23 patients （27 lesions） with surgery and pathology proved parotid tumors were reviewed retrospectively,and correlated with the surgery and pathology findings. Results： Of the 23 patients, there were pleomorphic adenoma （9 patients） ,Warthin tumor （8 patients, 12 lesions） cystic lymphangioma （3 patients） and hemangioma,basal cell adenoma,liopma for one patient each. Most of the benign parotid tumors were regular in shape,showing clear interface with the normal parotid tissue. The location of the 9 pleomorphic adenomas were superficial lobe （n= 7） and deep lobe （n= 2）, showing iso-intensity on T1 WI, hyper-intensity on T2 WI and markedly enhanced after contrast administration. The Warthin tumors showed mild hypo-intensity on T1 WI, iso- /hypo-intensity on T2 WI and slightly enhanced after contrast. The cystic lymphangioma showed as irregular shaped and multi-loculated cystic mass. The hemangioma displayed as heterogeneous,obvious long T1 and long T2 signal intensities. The mass was markedly enhanceed and abnormal enlarged vascular structures after intravenous injection of Gd-DTPA were shown. For the case with basal cell adenoma,tumor located in the deep lobe of parotid gland, presented as heterogeneous iso-/ hypo- intensity on T1 WI and heterogeneous hyper-intensity on T2WI, with mild- moderate enhancement after contrast. The liopma showed hyper-intensity both on T1WI and T2 WI. When correlated with the pathology findings,the accuracy of MRI in both localization and defining pathology nature were 95.7% （22/23 patients） and 82.6% （19/23 patients） respectively. Conclusion：There were certain MRI characteristics in different common benign parotid tumors, MRI showed important clinical values in the diagnosis and differential diagnosis.

关 键 词：腮腺肿瘤 磁共振成像 诊断 

分 类 号：R739.8[医药卫生—肿瘤]