Superior vena cava syndrome from small cell lung carcinoma

A peripheral nodule is visible in the posterior segment of the right upper lobe with adjacent large right paratracheal lymph nodes (white arrows) completely occluding the superior vena cava. Collateral vessels drain the contrast-enhanced venous blood towards the inferior vena cava. The internal mammary veins, the left superior intercostal vein, the lateral thoracic vein and the paravertebral veins are clearly visible.