From Dog

Hemothorax refers to the presence of frank blood in the thorax.

In dogs, this is commonly associated with:

These cases should be treated as medical emergencies and usually require chest drainage, with transfusion or autotransfusion if applicable[4].

Hemothorax needs to be distinguished from pyothorax or chylothorax.


  1. Rickman BH & Gurfield N (2009) Thymic cystic degeneration, pseudoepitheliomatous hyperplasia, and hemorrhage in a dog with brodifacoum toxicosis. Vet Pathol 46(3):449-452
  2. Byun JW et al (2009) An outbreak of fatal hemorrhagic pneumonia caused by Streptococcus equi subsp. zooepidemicus in shelter dogs. J Vet Sci 10(3):269-271
  3. Sasanelli M et al (2008) Haemothorax associated with Angiostrongylus vasorum infection in a dog. J Small Anim Pract 49(8):417-420
  4. Safaei M & Takami HM (2011) Blood autotransfusion outcomes compared with Ringer lactate infusion in dogs with hemorrhagic shock induced by controlled bleeding. J Res Med Sci 16(10):1332-1339