Fig. 8

Adenoid cystic carcinoma. A 38-year-old female presented with a painful preauricular swelling on the right side. Coronal T1-w MRI (A) shows a homogeneously hypointense mass (star) in the superficial lobe of the right parotid gland, which is hyperintense on the coronal T2-STIR MRI (B) and shows strong and homogeneous enhancement on the post-contrast T1-w image with fat suppression (C). The lesion is lobulated (arrow) as seen in the sagittal T2 image through the parotid gland (D). The lesion shows high signal intensity (arrow) on the high b value image (E) with a corresponding low signal (arrow) on the ADC map (F) indicating diffusion restriction. The parotid gland on the left side does not show any increase in signal intensity in the high b value image (E)