Treatment options in patients with chylothorax.

BACKGROUND

Chylothorax arises when lymphatic fluid (chyle) accumulates in the pleural cavity because of leakage from lymphatic vessels. It is most commonly seen after thoracic surgery (in 0.5% to 1% of cases) and in association with tumors. No prospective or randomized trials have yet been performed to evaluate the available treatment options.

METHOD

This review is based on a selective search of the PubMed database for pertinent publications from the years 1995 to 2013. Emphasis was laid on articles that enabled a comparative assessment of treatment options.

RESULTS

Initial conservative treatment (e.g., parenteral nutrition or a special diet) succeeds in 20% to 80% of cases. When such treatment fails, the standard approach up to the present has been to treat surgically, e.g., with ligation of the thoracic duct, pleurodesis, or a pleuroperitoneal shunt. The success rates of such procedures have ranged from 25% to 95%. Most of the patients undergoing such procedures are severely ill; complication rates as high as 38% have been reported, with mortality as high as 25%. In more recent publications, however, morbidity and mortality were lower. Interventional radiological treatments, such as percutaneous thoracic duct embolization or the percutaneous destruction of lymphatic vessels, succeed in about 70% of cases and lead to healing in up to 80% of cases, even after unsuccessful surgery. The complication rate of percutaneous methods is roughly 3%.

CONCLUSION

Interventional radiological procedures have now taken their place alongside conservative treatment and surgery in the management of chylothorax, although they are currently available in only a small number of centers.