腮腺良、恶性肿瘤的CT与MRI诊断

目的探讨腮腺良、恶性肿瘤的CT与MR诊断与鉴别诊断,以提高诊断准确率。方法回顾性分析我院经手术与病理证实的28例腮腺良、恶性肿瘤患者的临床资料与CT、MR资料。结果 28例患者中良性腮腺肿瘤18例,CT与MR主要表现为:呈类圆形等密度、MR等信号结节影,边界较清,轻度或中度均匀强化。恶性肿块10例,CT与MR主要表现为:类圆形或不规则形密度不均肿块,边界欠清,MR信号不均匀,增强后不均匀强化,伴侵犯周围组织。结论腮腺良、恶性肿瘤的CT与MR表现具有一定特征性,若肿块密度不均、形态不规则、边界不清、不均匀强化,常提示恶性腮腺肿瘤可能性大。

CT and MRI in the Diagnosis of Benign and Malignant Parotid Tumors

Objective To observe CT and MR imaging features of benign and malignant parotid tumors. Methods Clinical data, CT and MRI of 28 cases of benign and malignant parotid tumors proved by operation and pathology were analyzed retrospectively. Results 18 out of 28 cases were benign parotid tumors, main features of CT and MRI were as follows： a mass with homogeneous density and well defined boundary, homogeneous signal intensity in MRI, mild or moderate homogeneous enhancement. The other 10 cases were malignant parotid tumor, main features of CT and MRI were as follows：a mass with round or irregular shape, uneven density and unclear boundary, heterogeneous signal intensity in MRI, heterogeneous enhancement after contrast, and with a sign of invasion to the surrounding tissue. Conclusions CT and MR imaging features of benign and malignant parotid tumor have certain characteristics. The mass may be likely to be diagnosed with a malignant tumor if it is with uneven density, irregular shape, nuclear boundary, and heterogeneous enhancement.