腮腺肿瘤的CT及MRI诊断及鉴别诊断

目的：探讨腮腺肿瘤的CT及MRI表现,旨在提高对腮腺肿瘤的诊断水平。方法：回顾性分析经病理证实的90例腮腺肿瘤的CT及MRI的表现。结果：90例腮腺肿瘤中,良性肿瘤74例（82.2%）,恶性肿瘤16例（17.8%）。在CT/MRI上,良性肿瘤大部分表现为位于腮腺浅叶的圆形、椭圆形软组织肿块,边缘光整,密度/信号均匀;而恶性肿瘤,大部分位于腮腺深叶或跨叶,表现为不规则形软组织肿块,边缘不清,密度/信号不均匀,侵犯周围组织并伴淋巴结转移。结论：CT和MRI检查均能对腮腺肿瘤进行有效定位,并对诊断及鉴别诊断具有一定价值。

CT and MRI diagnosis and differentiation of parotid tumors

Objective：To analysis the CT and MRI appearances of parotid tumors,and improve the cognition parotid tumors.Methods：The CT/MRI findings of in 90 cases with parotid tumors were retrospectively analyzed.Results：Among 90 cases,there were 74（74/90,82.2%） benign tumors,16（16/90,17.8%） malignant tumors.On CT and MRI,most benign tumors were located in the shallow lobe,round or oval in shape,well-defined,homogeneous or heterogeneous soft tissue mass;and most of malignant tumor were located in the deep lobe or deep-shallow lobe, irregular in shape, ill-defined, heterogeneous soft tissue mass, infiltration of adjacent structure and lymph node metastasis. Conclusion： CT and MRI both can well demonstrate the size, number and location of parotid tumors , and there is still helpful for the diagnosis, differentiation and therapeutic decision.