Can lymphatic malformations elicit a high T1 signal?
No, they usually elicit low T1 and high T2 signals.
Do venous malformations elicit immediate enhancement on contrast?
No, they enhance gradually with contrast.
Do pure lymphatic malformations elicit contrast enhancement on MRI?
No, they only show minimal septal or peripheral enhancement.
A large multilocular cystic lesion is seen at the left lateral aspect of the neck, measuring about 10 x 9.4 x 11.3 cm in its maximum AP, TR, and CC diameters respectively. The lesion demonstrates low T1 and high T2 signals with internal septae of low T2 signal. It shows free diffusion. After contrast administration, it shows a faint enhancement of the wall and septae.
The lesion displaces the left sternomastoid muscle and carotid sheath vessels medially with the latter being patent and signal void. It extends inferiorly to the upper anterior chest wall and axillary region.