Fig. 7

Mucoepidermoid carcinoma, two cases. Patient 1 (A–C): An elderly patient had a low-grade mucoepidermoid carcinoma in a pleomorphic adenoma. The T1-w image without fat saturation (A) shows a heterogeneous lobulated lesion in the left parotid gland with rounded high signal areas on the native scans (white arrows). The T2-w image (B) also shows a similar area reflecting high protein content (white arrows) and additional cystic areas (blue arrow) with the usual fluid intensities. The T1-w fat saturated image (C), after administration of intravenous contrast, shows enhancement of the solid portions. There was little diffusion restriction (no images added). Patient 2 (D–F): A 31-year-old woman with a mucoepidermoid carcinoma of the left parotid gland. The axial T1‑w image (D) and axial TIRM image (E) show a heterogeneous lesion with multiple small cysts involving both the deep and the superficial lobe of the left parotid gland. The T1-w contrast medium enhanced fat suppressed image after administration of contrast (F) shows strong enhancement and slightly irregular infiltrating margins in the anteromedial part of the mass (white arrowhead)