Contrast enhanced CT of the chest of a 25 years old male with Hodgkin lymphoma shows a large confluent mass (arrows) in the anterior mediastinum encasing, but not compressing, the right and left brachiocephalic veins (A and D respectively), brachiocephalic artery (B), left common carotid artery (C) and left subclavian artery (E). Prominent opacification of the left brachiocephalic vein is due to injection of the radiographic contrast in the left arm. Left sided pleural effusion is also seen