Fig. 1

Pleomorphic adenoma. A 39-year-old male presenting with a painless preauricular swelling on the left side, which was proven to be a pleomorphic adenoma. Coronal T2-w MRI (A) shows a predominantly hyperintense lesion of the left parotid gland (arrow), which is hypointense on T1-weighted image (B). The lesion lies in both the deep and the superficial parotid with an hourglass configuration. The coronal (C) and axial (D) images after injection of intravenous gadolinium with fat saturation shows heterogeneous enhancement of the lesion. The signal intensity is high in the diffusion-weighted image (E) and it remains high in the ADC maps (F) with ADC values (o) of 2300 ± 270 × 10⁻⁶ mm²/s and this is helpful for identifying pleomorphic adenoma