A Case Report of Behcet's Disease With Thromboses in the Superior Vena Cava and External Iliac Vein.

Behcet's disease (BD), also known as Behcet's syndrome, is a rare, chronic, autoimmune disorder of unknown origin. Its manifestations are thought to be caused by vasculitis, resulting in damage to blood vessels of all sizes throughout the body. We report a 25-year-old Pakistani male who is sexually active and presents with a one-year history of shortness of breath, cough, exertional dyspnea, and neck and facial swelling.