Peritracheal abscess associated with tracheal collapse and bilateral laryngeal paralysis in a dog.

Tracheal collapse and bilateral laryngeal paralysis were diagnosed in an 8-month-old Cocker Spaniel that had acute onset of dyspnea and cyanosis. Surgical exploration of the mediastinum revealed an abscess involving the ventral wall of the trachea immediately caudal to the thoracic inlet. Both recurrent laryngeal nerves were entrapped in fibrous tissue surrounding the abscess. The dog recovered after tracheal resection and anastomosis and freeing of the entrapped nerves. The peritracheal abscess was suspected to have been the result of esophageal perforation secondary to foreign body penetration.