Removal of a cholesteatoma in a dog, using a caudal auricular approach.
A new surgical method for treating cholesteatoma in dogs is described. Although rarely reported in dogs, cholesteatomas may be more common than previously believed. Complete excision of a cholesteatoma is associated with low recurrence and good long-term prognosis. Surgical intervention, with total ear canal ablation and lateral bulla osteotomy, has been recommended in dogs with tumors of the middle ear; however, this technique often results in conductive hearing loss. Through a caudal auricular approach to the tympanic bulla, we were able to preserve the external ear canal, reconstruct the auditory ossicles, and graft the tympanic membrane. Results of brain stem auditory-evoked response tests in the dog revealed intact conduction potentials. A caudal auricular approach to the tympanic bulla is technically possible, preserves normal appearance, and may maintain, or even improve, hearing conduction of affected ears in dogs.
Davidson
E B
EB
Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis 95616, USA.
Brodie
H A
HA
Breznock
E M
EM
D000818:Animals; D018424:Cholesteatoma, Middle Ear / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D004283:Dog Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D004285:Dogs; D004424:Ear Canal / Q000473:pathology / Q000601:surgery; D004429:Ear Ossicles / Q000473:pathology / Q000601:surgery; D004848:Epithelium / Q000737:chemistry / Q000473:pathology; D007633:Keratins / Q000032:analysis; D008297:Male; D010027:Osteotomy / Q000379:methods / Q000662:veterinary; D019736:Prostheses and Implants / Q000662:veterinary; D014057:Tomography, X-Ray Computed / Q000379:methods / Q000662:veterinary; D014432:Tympanic Membrane / Q000473:pathology / Q000601:surgery
D007633:Keratins