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CT and MRI Findings of Adenolymphoma in Parotid Gland

CHEN Zu-hua,ZHOU Ren-wu,YAO Wei-tu,et al.Department of Radiology,the Fourth Hospital of Zhejiang,Hangzhou 310002,P.R.China  
Objective:To discuss the CT and MRI findings of Warthin′s tumor in parotid gland.Methods:12 patients had pathology proven Warthin′s tumor in the parotid gland,CT and MRI findings were retrospectively analysed.Results:Of the 12 cases,there were male (n=10),female (n=2),8 patients (66.7%) were over 50 years of age.Altogether there were 16 lesions,with solitary (n=9),multiple (n=3).All lesions were located unilaterally,with the mass located in the lower-posterior part of the gland (n=9,56.3%).On CT and MRI,lesions were round、oval or lobulated in shape,well-defined,homogeneous or heterogeneous soft tissue mass.Cystic area showed round shape and liquid density.On MRI,lesions were hypointense on T_1WI,while hyterintense on T_2WI with fat suppress sequences,cystic area showed long T_1、T_2 signal intensities.After contrast administration,most of the lesion showed early mild or moderate enhancement on CT or MRI.Conclusion:Clinical materials including age,gender,location and imaging manifestations of lesion plays a helpful role in the diagnosis and differential diagnosis of Warthin′s tumor.
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