Changes

**'''Obstruction of the thoracic duct''', the major lymphatic vessel that runs through the chest.  This may occur due to traumatic rupture or due to the presence of a neoplastic mass.

**'''Obstruction of the thoracic duct''', the major lymphatic vessel that runs through the chest.  This may occur due to traumatic rupture or due to the presence of a neoplastic mass.

*Increased pressure in the systemic veins reducing the pressure gradient from the thoracic duct to the subclavian veins

*Increased pressure in the systemic veins reducing the pressure gradient from the thoracic duct to the subclavian veins

**'''[[Heart Failure, Right-Sided|Right-sided heat failure]]''' due to [[Cardiomyopathies|cardiomyopathy]], [[Cardiac Tamponade|cardiac tamponade]] or [[Tricuspid Valve Dysplasia|tricuspid dysplasia]], [[Cor Pulmonale]] or Cor Triatriatum Dexter.   

**'''[[Heart Failure, Right-Sided|Right-sided heat failure]]''' due to [[Cardiomyopathy|cardiomyopathy]], [[Cardiac Tamponade|cardiac tamponade]] or [[Tricuspid Valve Dysplasia|tricuspid dysplasia]], [[Cor Pulmonale]] or Cor Triatriatum Dexter.   

**Obstruction to venous return by '''intra-thoracic masses''' including thymoma and thymic lymphoma.

**Obstruction to venous return by '''intra-thoracic masses''' including thymoma and thymic lymphoma.