Ultrasound And Computed Tomography Features Of Primary Acinic Cell Carcinoma In The Parotid Gland

Objective: The aim of this study was to characterize the ultrasound (US) a ndcomputed tomography (CT) findings of primary acinic cell carcinoma (AciCC) of theparotid gland.Methods: Seventy patients (70lesions) with histopathologically proven AciCCunderwent US or CT examination. The following characteristics were assessed on USimages: size, shape, border, echogenicity, echotexture, internal structure, distalacoustic enhancement, and vascularity. The following characteristics were evaluatedon CT images: size, shape, border, density, CT values on plain and contrast-enhancedscans, 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 andwell-defined, and showed slight heterogeneous enhancement.Conclusion: These findings suggest that most primary AciCCs show benign featureson US and CT.