Torsion of the accessory lung lobe is extremely rare and has been reported only in one human. Accessory lung lobe torsion (LLT) and chylothorax occurred in a 3.5-year-old, male Afghan hound. An exploratory thoracotomy was used to remove the torsed lung lobe. When medical management of the chylous effusion failed, thoracic duct ligation was performed, resulting in resolution of the effusion. The dog remains clinically healthy 29 months postoperatively.

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