Traumatic separation of the annular cartilage from the external auditory meatus in a cat.

A 13-year-old cat was evaluated because of anorexia and otic discharge of 1 week's duration. A left head tilt and left facial nerve deficit were evident. Pink fleshy tissue was seen in the area where the tympanic membrane was expected during otoscopic examination. The left ear canal was laterally displaced from the skull on a rostrocaudal (open mouth) radiographic view, suggesting ear canal separation. During surgery, the annular cartilage was found to be separated from the external auditory meatus, and total ear canal ablation was performed. Complications did not develop, and facial nerve function returned 6 weeks after surgery. In previous reports, traumatic ear canal separation was diagnosed after trapped otic secretions formed abscesses or para-aural fistulas.