Chyle: An opaque, milky-white fluid consisting mainly of emulsified fats that passes through the lacteals of the small intestines into the lymphatic system.Chylothorax: The presence of chyle in the thoracic cavity. (Dorland, 27th ed)Chylous Ascites: Presence of milky lymph (CHYLE) in the PERITONEAL CAVITY, with or without infection.Thoracic Duct: The largest lymphatic vessel that passes through the chest and drains into the SUBCLAVIAN VEIN.Lymphangiectasis: A transient dilatation of the lymphatic vessels.Pericardial Effusion: Fluid accumulation within the PERICARDIUM. Serous effusions are associated with pericardial diseases. Hemopericardium is associated with trauma. Lipid-containing effusion (chylopericardium) results from leakage of THORACIC DUCT. Severe cases can lead to CARDIAC TAMPONADE.Chylomicrons: A class of lipoproteins that carry dietary CHOLESTEROL and TRIGLYCERIDES from the SMALL INTESTINE to the tissues. Their density (0.93-1.006 g/ml) is the same as that of VERY-LOW-DENSITY LIPOPROTEINS.Drainage: The removal of fluids or discharges from the body, such as from a wound, sore, or cavity.