title: Investigation of superior vena caval obstruction.
mesh_terms: D000328:Adult; D000368:Aged; D003251:Constriction, Pathologic / Q000175:diagnosis / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009369:Neoplasms / Q000150:complications; D014652:Vascular Diseases / Q000175:diagnosis / Q000209:etiology; D014683:Vena Cava, Superior