HILOTORAX - accumulation of lymph in the pleural cavity. It occurs as a result of damage to the wall of the thoracic duct during thoracic surgery, much less often - with injuries of the chest, as well as due to malformations of the thoracic duct, inflammatory and tumor processes of various organs of the chest cavity. Clinical manifestations are due to compression of the lung and displacement of the mediastinum with symptoms of respiratory failure and impaired hemodynamics. Treatment is carried out in a hospital. Shown are pleural puncture or drainage of the pleural cavity with lymph removal, parenteral nutrition. With a long process, the need for surgical intervention may arise - intrathoracic ligation of the damaged duct.