Objective—To identify breed disposition, postoperative
complications, and outcome in dogs with lung
Animals—22 client-owned dogs.
Procedure—Information on signalment; history; clinical
findings; results of clinicopathologic testing, diagnostic
imaging, and pleural fluid analysis; surgical
treatment; intra- and postoperative complications; histologic
findings; and outcome were obtained from
Results—All 22 dogs had pleural effusion; dyspnea
was the most common reason for examination.
Fifteen dogs were large deep-chested breeds; 5 were
toy breeds. Afghan Hounds were overrepresented,
compared with the hospital population. One dog was
euthanatized without treatment; the remaining dogs
underwent exploratory thoracotomy and lung lobectomy.
Eleven dogs recovered from surgery without
complications, but 3 of these later died of thoracic
disease. Four dogs survived to discharge but had clinically
important complications within 2 months,
including chylothorax, mediastinal mesothelioma,
gastric dilatation, and a second lung lobe torsion. Six
dogs died or were euthanatized within 2 weeks after
surgery because of acute respiratory distress syndrome,
pneumonia, septic shock, pneumothorax, or
chylothorax. Chylothorax was diagnosed in 8 of the 22
dogs, including 4 Afghan Hounds.
Conclusion and Clinical Relevance—Results suggest
that lung lobe torsion is rare in dogs and develops
most frequently in large deep-chested dogs, particularly
Afghan Hounds. Other predisposing causes
were not identified, but an association with chylothorax
was evident, especially in Afghan Hounds.
Prognosis for dogs with lung lobe torsion was fair to
guarded. (J Am Vet Med Assoc 2000;217:1041–1044)