Well-defined multiseptated cystic lesion of the left cervical region, measuring 95 x 40 x 30 mm, extending from the submandibular region up to the medial supraclavicular region between the sternocleidomastoid (SCM) muscle and left thyroid lobe. It elicits a low signal on T1, high signal on T2 with a low signal of the internal septae. Moderate peripheral enhancement is noted mainly of its upper part with no enhancement of the internal septae. The SCM muscle is displaced laterally and carotid vessels and internal jugular vein medially.