title: Ultrasound and computed tomography features of primary acinic cell carcinoma in the parotid gland: a retrospective study.
abstract: OBJECTIVE
  The aim of this study was to characterize the ultrasound (US) and computed tomography (CT) findings of primary acinic cell carcinoma (AciCC) of the parotid gland.
  
  
  METHODS
  Seventy patients (70 lesions) with histopathologically proven AciCC underwent US or CT examination. The following characteristics were assessed on US images: size, shape, border, echogenicity, echotexture, internal structure, distal acoustic enhancement, and vascularity. The following characteristics were evaluated on CT images: size, shape, border, density, CT values on plain and contrast-enhanced scans, enhancement pattern, enhancement degree, and surrounding bone destruction.
  
  
  RESULTS
  On US images, lesions were irregular, well-defined, hypoechoic, heterogeneous, and poorly vascularized. On CT images, lesions were regular and well-defined, and showed slight heterogeneous enhancement.
  
  
  CONCLUSIONS
  These findings suggest that most primary AciCCs show benign features on US and CT.
authors.affiliation: Department of Ultrasound, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: xpyxpy2011@163.com.
authors.forename: Jia
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Ultrasound, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: gongxiafeng@163.com.
authors.forename: Xia
authors.initials: X
authors.lastname: Gong
authors.affiliation: Department of Ultrasound, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: xiongpxp@163.com.
authors.forename: Ping
authors.initials: P
authors.lastname: Xiong
authors.affiliation: Department of Ultrasound, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: xu_qiu_hua@msn.com.
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Xu
authors.affiliation: Department of Radiology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: 13917266194@126.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Biomedical Engineering, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: yazhuchen@sjtu.edu.cn.
authors.forename: Yazhu
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Pathology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao tong University, Shanghai, PR China. Electronic address: tian0304_cn@163.com.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Tian
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018267:Carcinoma, Acinar Cell / Q000175:diagnosis*; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D010307:Parotid Neoplasms / Q000175:diagnosis*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014463:Ultrasonography / Q000379:methods*; D055815:Young Adult
keywords: Acinic cell carcinoma; CT; Salivary gland neoplasms; US