SVC (superior vena cava) syndrome is a set of symptoms that result when blood flow from the superior vena cava (the large blood vessel that returns blood from the head, neck, and arms) to the heart is blocked.
Symptoms of SVC syndrome are due to increased pressure in the superior vena cava and can include: swelling of the face, arms, or chest; coughing; shortness of breath; and widening of the veins in the neck and chest.
With lung cancer, SVC syndrome most commonly occurs with tumors that are located in the upper part of the right lung.
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