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腮腺黏液表皮样癌的MRI表现

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目的:分析腮腺黏液表皮样癌(MEC)的常规MRI和DWI表现.方法:回顾性分析42个经病理证实的腮腺MEC的术前MRI资料,评估肿瘤的位置、形态、边界、大小、均质程度、信号特征、ADC值、强化方式、包膜及与周边结构的关系.结果:41例MEC患者中40例为单侧单发肿瘤,1例患者为单侧双发肿瘤,21个病灶位于腮腺浅叶,21个跨深浅叶.病灶最长径为(2.5±1.0)cm,其中28个肿瘤形态不规则,28个边界不清,3个病灶存在包膜.病灶多表现为等T1长T2信号,7个病灶中T2明显高信号区出现分隔状、环状极低信号;ADC值约(1.05±0.17)×10-3mm2/s;增强后呈中度-明显强化.14例病灶侵犯周围结构,3例发生淋巴结转移.结论:腮腺MEC的MRI表现具有一定的特征性,有助于准确判断肿瘤的范围及侵犯的结构,为临床手术方式的选择提供有用的信息.
MRI Findings of Mucoepidermoid Carcinoma of the Parotid Gland
Objective:To assess the conventional magnetic resonance imaging(MRI)and diffusion weighted imaging(DWI)findings of mucoepidermoid carcinoma(MEC)of the parotid gland.Methods:The preoperative MRI data of 42 cases confirmed by pathology,including location,morphology,border,size,homogeneous degree,signal characteristics,apparent diffusion coefficient(ADC)value,enhancement degree and adjacent structure,were retrospectively analyzed.Results:Among 41 MEC patients,40 cases were unilateral single tumor,1 case was unilateral double tumor,21 lesions were located in the superficial lobe of the parotid gland,and 21 lesions spanned the deep and superficial lobes.The maximum diameter of tumors was(2.5±1.0)cm.28 lesions showed irregular morphology,28 had unclear border and 3 possessed capsule.Tumors often demonstrated as iso-intensity on T1WI and hyper-intensity on T2WI.In 7 lesions,the obvious high signal area on T2 showed a compartmentalized and annular very low signal.The ADC value was about(1.05±0.17)×10-3mm2/s.MEC revealed moderate or obvious enhancement after contrast agent injection.14 lesions invaded surrounding structures and 3 had lymph node metastasis.Conclusions:The characteristic MRI manifestations of parotid MEC provided valuable information,such as the tumor extent and adjacent structure invasion,supportive for the determination of therapeutic strategy.

mucoepidermoid carcinomaparotid glandmagnetic resonance imagingdiffusion weighted imaging

杨玉斌、郑颖彦、佘德君、陈潭辉

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福建省永安市立医院影像科(福建 永安 366000)

福建医科大学附属第一医院影像科(福建 福州 350000)

黏液表皮样癌 腮腺 磁共振成像 弥散加权成像

2024

中国医疗器械信息
中国医疗器械行业协会

中国医疗器械信息

影响因子:0.375
ISSN:1006-6586
年,卷(期):2024.30(2)
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