Chylothorax is the accumulation of excess chyle in the chest cavity. Chyle is a white colored liquid made of absorbed fat and lymph from the intestine that normally drains into the cisterna chyli of the thoracic duct
Chylothorax is a rare condition in dogs and cats due to lymphatic fluid building up and gathering in the pleural cavity. The pleural cavity is located between the lungs and the inner lining of the chest wall.
In a normal situation, 5 milliliters or the equivalent of a teaspoon of clear fluid is found in this area. The fluid’s purpose is to prevent the surface of the lungs from drying up so that it does not stick to the chest wall. In cats and dogs with chylothorax, up to a liter of fluid may be stored in this pleural cavity.
















