Imaging diagnosis--laryngeal collapse due to cricoid cartilage fracture.

The dog was hit by a car and immediately after the accident no abnormalities were present. One month later there were changes in phonation and dyspnea. Considerations were laryngeal paralysis, laryngeal neoplasia, abscess, cyst, granuloma, or hematoma. Laryngeal collapse due to chondromalacia was considered less likely due to the breed. The laryngeal lumen was narrow with an irregular mucosal surface and a mass was considered. A biopsy of the mucosal surface was interpreted as inflammation and granulation tissue.