MRI of the tumour. (A) out-of-phase, (B) in-phase, (C) T2WI, (D) DWI b = 800, and (E) ADC images. The lesion is almost isointense to muscle on T1WI, without the fat component. It has a slightly higher intensity than muscle on T2WI; however, the dorsal portion of the tumour is slightly lower in signal than the ventral one. The central portion has the highest T2 intensity. The ADC of the dorsal portion is lower than that of the ventral portion. Abbreviations: ADC = apparent diffusion coefficient; T1WI = T1-weighted imaging; T2WI = T2-weighted image.