Obstruction of the superior vena cava.
D001984:Bronchial Neoplasms / Q000150:complications*; D002283:Carcinoma, Bronchogenic / Q000150:complications; D002294:Carcinoma, Squamous Cell / Q000150:complications; D003490:Cyanosis / Q000209:etiology; D004487:Edema / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications*; D008875:Middle Aged; D014652:Vascular Diseases / Q000209:etiology*; D014683:Vena Cava, Superior