Background
Chylothorax refers to the presence of lymphatic fluid in the pleural space secondary to leakage from the thoracic duct or one of its main tributaries. In 1875, H. Quinke described the first traumatic chylothorax. In 1948, R.S. Lampson performed the first thoracic duct ligation.
See the images below.
Anteroposterior upright chest radiograph shows a massive left-sided pleural effusion with contralateral mediastinal shift. Image courtesy of Allen R. Thomas, MD. A CT scan of the chest of a 3-year old child showing left side effusion and underlying parenchymal infiltrate and atelectasis. Image courtesy of Ibrahim Abdulhamid, MD.Pathophysiology
A tear or leak in the thoracic duct causes chylous fluid to collect in the pleural cavity, which can cause acute or chronic alterations in the pulmonary mechanics. In a normal adult, the thoracic duct transports up to 4 L of chyle per day, allowing a rapid and large accumulation of fluid in the chest.
Epidemiology
Frequency
International
The prevalence after various cardiothoracic surgeries is 0.2-1%.
Mortality/Morbidity
Mortality and morbidity rates are approximately 10% in major clinical medical centers.
Sex
Chylothorax has no predilection for either sex.
Age
Chylothorax has no predilection for age.
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