The superior vena cava can be obstructed by:

♦ External compression (primary tumour or lymph nodes)

♦ Thrombus (secondary to compression; also IV catheters)

♦ Combination of above

In cancer patients the commonest cause is external compression by either a primary tumour in the right paratracheal region or a secondary tumour in the paratracheal lymph nodes.

Lung cancer is the commonest tumour to cause superior vena cava obstruction (SVCO), but any tumour spreading to the mediastinal nodes (especially lymphomas) may do so. Other causes include ruptured thoracic aortic aneurysm and trauma.

0 0

Post a comment