Good afternoon. What are the symptoms if is person is suffering from superior vena cava syndrome? According to my symptoms I notice swelling under my both eyes and my neck veins are also visible. I have tumour in right paracardiac area of chest encasing superior vena cava. And for the past few months I am also using huminsulin 30/70 injection. Is this swelling due to that? Or itis bcz of mass. Kindly reply asap. Thanks.