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Updated: May 27, 2026

Endoscopic Cholesteatoma Surgery
Published on: January 19, 2022
Cholesterol granuloma as long-term complication of total ear canal ablation in a dog
B Riedinger1, O Albaric, O Gauthier
1Small Animal Surgery Department, Oniris Nantes-Altantic College of Veterinary Medicine, Food Science and Engineering, Nantes, France.
Abstract:
A 13-year-old cocker spaniel presented with pain on opening the mouth. History of a previous left total ear canal ablation with lateral bulla osteotomy, left intermittent facial palsy and left intermittent head tilt suggested progression of a total ear canal ablation with lateral bulla osteotomy complication. Magnetic resonance imaging revealed a large mass arising from the tympanic bulla. Cytology of aspirates revealed a chronic suppurative inflammatory reaction and numerous cholesterol crystals. The mass was removed by surgical excision and an active drainage system was placed for a few days. The head tilt, facial palsy and apparent pain were resolved by the surgery. Physical examination was unremarkable nine months postoperatively. Bacterial cultures of the collected fluid were negative and histological examination confirmed the diagnosis of a cholesterol granuloma.
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