Superior vena cava syndrome in a patient with lymphoma

Axial CT scan image of a patient with non-Hodgkin's lymphoma and massive mediastinal lymph node enlargement. The superior vena cava is occluded and kept open by a Porta-A Cath (arrow). The lymphomatous mass encases the aortic arch (arrowhead) and displaces the trachea posteriorly. The azygos vein (dashed arrow) and the left lateral thoracic veins are dilated and enhancing. A right pleural effusion is visible. Of note, ring-like dystrophic calcifications are seen in the lymphomatous mass.