腮腺嗜酸细胞癌的MRI表现(附4例报告)  

MRI Features of Oncocytic Carcinoma of Parotid Gland:Report of 4 Cases

作　　者：戴维[1] 李红[2] 戴平丰[2] 王国凤[3] 张敏鸣[2] 姚克[1] 

机构地区：[1]浙江大学医学院附属第二医院眼科,310009 [2]浙江大学医学院放射科 [3]浙江大学医学院病理科

出　　处：《临床放射学杂志》2015年第2期294-296,共3页Journal of Clinical Radiology

摘　　要：目的初步探讨腮腺嗜酸细胞癌的MRI表现特点。方法回顾性分析经病理证实的4例腮腺嗜酸细胞癌患者的MRI表现。结果 1例位于浅叶,3例位于深叶;1例肿瘤呈结节状,边缘棘突样改变,3例形态不规则,呈分叶状,其中2例肿瘤边界不清,1例边界清楚;4例肿瘤T1WI上均呈低信号(2例信号均匀,2例信号不均匀)、T2WI信号不均匀(2例T2WI呈较低信号,2例抑脂T2WI呈稍高信号);2例肿瘤内见流空血管影;3例行MRI增强扫描,病灶呈轻中度强化。结论腮腺嗜酸细胞癌在MRI上有一定的表现特点,认识其表现有助于鉴别诊断。Objective To preliminary investigate MRI features of oncocytic carcinoma of parotid gland. Methods The MRI findings of four patients with pathologically-proved oncoeytic carcinoma of parotid gland were retrospectively ana- lyzed. Plain MRI scan was employed in one case, and both plain and contrast-enhanced MRI scans were carried out in 3 cases. Results The lesions were located in superficial lobe （ n = 1 ） or in deep lobe （ n = 3 ）. One lesion presented as a nodule with spinous margin. In the other 3 cases, the lesions were irregular or lobulated, among them two showed blur bor- der and one carried a clear border. The tumors were characterized by low signal on T1 WI, homogeneous （ n = 2） or inhomo- geneous （ n = 2） ; and the si^al was inhomogeneous on T2 WI, presenting as slightly lower signal on T2 WI （ n = 2 ） or slightly higher signal on fat-suppressed T2WI （ n =2）. Vascular flow void shadow within the tumor was observed in 2 ca- ses. In three eases who received contrast-enhanced MRI scanning, the lesions showed mild-to-moderate enhancement. Conclusion Oncocytie carcinoma of parotid gland carries certain MR1 characteristics. The understanding of its imaging features is very helpful in making differential diagnosis.

关 键 词：腮腺 嗜酸细胞癌 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.8[医药卫生—诊断学]