RADIOLOGY: HEAD: Case# 33047: SQAMOUS CELL CA, BASE OF TONGUE. 73 year old male who awoke one morning with a large left sided neck mass. In the last 2.5 months, the mass has not changed significantly in size. There is a well-circumscribed mixed density mass measuring 6x4x3.5cm in the left side of the neck. The mass lies anterior and deep to the sternocleidomastoid and lateral to the carotid sheath. There is some minimal hazing of the surrounding fat. The lesion extends superiorly from the lower aspect of the parotid to the level of the thyroid cartilage. No other soft tissue mass or nodes are seen. The internal jugular vein and common carotid artery are compressedand displaced posteriorly, but there is no thrombosis within the internal jugular vein.