Final answer:
A chylothorax typically presents with chyle on thoracentesis, which is a milky fluid rich in triglycerides from the lymphatic system.
Step-by-step explanation:
A chylothorax typically presents with chyle on thoracentesis. This milky fluid is rich in triglycerides and is found in the thoracic duct, part of the lymphatic system that transports lymph from the lower and upper parts of the body into the blood circulation. In a chylothorax, the thoracic duct or its tributaries are damaged, leading to the accumulation of chyle in the pleural space.