Figure 6 A case of right adenoid cystic carcinoma. White arrow indicates ill-defined mass lesion seen in the hard palate. It exhibits low T1 (a) and high T2 (b) with heterogeneous enhancement (c and d). It appears high in DWI and low ADC (restricted diffusion pattern) (e and f). ADC, apparent diffusion coefficient; DWI, diffusion-weighted imaging.