Chylothorax


A chylothorax or chyle leak is a type of pleural effusion It results from lymph formed in the digestive system called chyle accumulating in the pleural cavity due to either disruption or obstruction of the thoracic duct

In people on a normal diet, this effusion can be identified by its turbid, milky white appearance, since chyle contains high levels of triglycerides It is important to distinguish chylothorax from pseudochylothorax pleural effusions high in cholesterol, which has a similar appearance, but is caused by more chronic inflammatory processes, and has a different treatment 1

Contents

  • 1 Causes
  • 2 Treatment
  • 3 See also
  • 4 References
  • 5 External links

Causesedit

The condition is rare but serious, and appears in all mammals It results from leakage of lymph fluid from the thoracic duct or one of its tributaries This can result from direct laceration eg, from surgery or from nontraumatic causes The most common nontraumatic cause is malignancy, especially lymphoma Less common is left-heart failure, infections, and developmental abnormalities such as Down syndrome and Noonan syndrome2

Treatmentedit

Since the mechanism behind chylothorax is not well understood, treatment options are limited Drainage of the fluid out of the pleural space is essential to obviate damage to organs, especially the inhibition of lung function by the counter pressure of the chyle Another treatment option is pleuroperitoneal shunting creating a communication channel between pleural space and peritoneal cavity By this surgical technique loss of essential triglycerides that escape the thoracic duct can be prevented Omitting fat in particular FFA from the diet is essential Either surgical or chemical pleurodesis are options: the leaking of lymphatic fluids is stopped by irritating the lungs and chest wall, resulting in a sterile inflammation This causes the lung and the chest wall to be fused together which prevents the leaking of lymphatic fluids into the pleural space The medication octreotide has been shown to be beneficial and in some cases will stop the chylothorax after a few weeks34

In animals, the most effective form of treatment until recently has been surgical ligation of the thoracic duct combined with partial pericardectomy5 There is at least one case report in a cat of clinical response to treatment with rutin6

See alsoedit

  • Pleural effusion

Referencesedit

  1. ^ Heffner, John "Clinical presentation, diagnosis and management of cholesterol effusions" 80 UpToDate Retrieved 30 October 2014 
  2. ^ 1
  3. ^ Dalokay Kilic, MD; Ekber Sahin, MD; Oner Gulcan, MD; Bulent Bolat, MD; Riza Turkoz, MD; Ahmet Hatipoglu, MD 2005 "Octreotide for Treating Chylothorax after Cardiac Surgery" Texas Heart Institute Journal 32 3: 437–39 PMC 1336729  PMID 16392238 
  4. ^ Marcia L Buck, PharmD, FCCP 2004 "Octreotide for the Management of Chylothorax in Infants and Children" Pediatric Pharmacotherapy 10 10 CS1 maint: Multiple names: authors list link
  5. ^ Birchard SJ, Smeak DD, McLoughlin MA March 1998 "Treatment of idiopathic chylothorax in dogs and cats" J Am Vet Med Assoc 212 5: 652–7 PMID 9524635 
  6. ^ Kopko SH August 2005 "The use of rutin in a cat with idiopathic chylothorax" Can Vet J 46: 729–31 PMC 1180424  PMID 16187718 

External linksedit

  • 00085 at CHORUS
  • University of Wisconsin: http://wwwvetmedwiscedu/dss/ChyloThoraxTrial/page5php
  • Morris Animal Foundation: http://wwwmorrisanimalfoundationorg/ada_studiesphpcol=study&val=179


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