(A) Pre-contrast, (B) early arterial, (C) late arterial, and (D) equilibrium-phase CT. On pre-contrast CT, the tumour is isodense compared to the muscle, and there is no calcification. The dorsal portion of the tumour has a peak of contrast in the late arterial phase, with washout in the equilibrium phase. The ventral portion of the tumour gradually enhanced until the equilibrium phase.