[The value of high resolution diffusion weighted imaging in differentiating benign and malignant epithelial tumors of parotid gland].

To investigate the diagnostic value of RESOLVE DWI in the evaluation of benign and malignant epithelial tumors of parotid gland. A total of 106 patients in the First Affiliated Hospital of Zhengzhou University with epithelial tumors of parotid gland confirmed by pathology from July 2015 to October 2017 were retrospectively analyzed. All patients underwent preoperative routine MRI and RESOLVE DWI, the ADC average values were calculated, test were used to compare the ADC values of benign and malignant epithelial tumors of parotid gland. Diagnostic performance of ADC value was compared using receiver operating characteristic (ROC)curves. All lesions were solitary, including 69 benign epithelial tumors and 37 malignant epithelial tumors. The mean ADC values of pleomorphic adenoma and basal cell adenoma, adenolymphoma and malignant epithelial tumors were (1.47±0.16)×10(-3) mm(2)/s, (0.83±0.19)×10(-3) mm(2)/s and(1.14±0.14)×10(-3) mm(2)/s, the mean ADC value of adenolymphoma lower than the rest of the two groups, there were statistically significant differences among them (<0.05). Using 0.94×10(-3) mm(2)/s≤ADC value≤1.28×10(-3)mm(2)/s as the critical value for diagnosing malignant epithelial tumors of parotid gland and comparing with pathological results, the result obtained had a sensitivity of 81.1%, specificity of 88.9%. ADC value had high correlations compared with pathological results, value was 0.600. RESOLVE DWI can be applied in differential diagnosis between benign and malignant epithelial tumors of parotid gland.