The narrowing or obstruction of the superior vena cava, the major vein draining the upper body. Prompt treatment of causative disorders may reduce the risk of development of SVC obstruction. Symptoms may begin suddenly or gradually and may worsen when bending over or lying down.
Blood pressure is often high in the arms and low in the legs.
A bronchoscopy may be performed if lung cancer is suspected. Diuretics may be used to relieve swelling . The cause must be identified and treated. This may include radiation, chemotherapy , surgical removal of tumors, or other treatment. Surgery to bypass of the obstruction is rarely performed.