Objective To explore the value of conventional ultrasound (US) combined with shear wave elastography (SWE) in the differential diagnosis of parotid pleomorphic adenoma and Warthin''s tumor

and compare the diagnostic efficiency with MRI. Methods Select 81 cases of parotid gland tumors confirmed by pathology

58 cases of pleomorphic adenoma and 23 cases of Warthin''s tumor

Compare the US characteristics of two lesions: Shape

boundary

hyper echo

anechoic

blood flow distribution

blood flow grade and SWE quantitative parameters: Emax

Emean

Emin

SD. Results There were statistical significance in the tumor Shape

hyper echo

anechoic

blood flow distribution

blood flow grade and Emax

Emean

SD between the pleomorphic adenoma and Warthin''s tumor (P＜0.05)

The area under the ROC (AUC) of the Logistic equation predicted values of US

SWE and US+SWE are 0.881

0.837

0.962. The diagnostic sensitivity

specificity

accuracy of US+SWE and MRI were (85%

87.27%)

(88%

84%)

(86.2%

86.2%)

The difference was not statistically significant (P＞0.05)

the diagnostic value is consistent. Conclusions Conventional ultrasound combined with shear wave elastography can improve the ability of differential diagnosis pleomorphic adenoma and Warthin''s tumor of parotid

and the diagnostic efficiency is comparable to MRI.