CT and MRI in the Diagnosis of Benign and Malignant Parotid Tumors
Sristi Singh;LIU Zhenyin;Sun Yat-sen University Cancer Center;
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.
【CateGory Index】： R739.8