Objective:

To improve the diagnostic accuracy between parotid gland mixed tumor and parotid gland adenolymphoma by comparing their features on magnetic resonance imaging (MRI).

Methods:

The clinical data of 26 cases of parotid gland mixed tumor and 42 cases of parotid gland adenolymphoma were collected from 2015 to 2018 in 909th Hospital of the Joint Logistics Support Force of PLA. The features of MRI imaging

include lesion number

morphology

signal and enhancement

were retrospectively analyzed.

Results:

With epidemiology

the incidence rate of the parotid gland adenolymphoma in male is si

gnificantly higher than that of female aging rang from middle-aged and old age. But there is no difference between the mixed tumor

aging rang from young and middle-aged age. According to MRI images

We found that the mixed tumor was generally single (all of 26 cases)

but the parotid gland adenolymphoma can be multiple (11 case of 46 cases). In addition

the mixed tumor was usually progressive enhancement and the mixed signal

but the parotid gland adenolymphoma was significantly enhanced in the early stage and then delayed rapidly.

Conclusion:

The MRI features of the mixed tumor and adenolymphoma of the parotid gland have certain characteristics

which can improve the diagnostic accuracy of the two.