Figure 5b. Hemangioma in a 1-year-old girl with a cervical mass. Contrast-enhanced coronal T1-weighted electrocardiographically gated MR images (546/30) (a obtained anterior to b) show a heterogeneous, enhancing cervicothoracic mass with multiple flow voids (arrow in a). The mass reaches the mediastinum and displaces the enlarged internal jugular vein (arrow in b). Note the enlarged external jugular vein draining the mass (arrowhead in b).