Outcomes of canal wall down mastoidectomy in cholesteatoma : a 5-year experience

Asfa Naimi, Mohamad Yusof and Boon, Wei Jie and Aisyah, Ali and Tang, Ing Ping (2023) Outcomes of canal wall down mastoidectomy in cholesteatoma : a 5-year experience. The Egyptian Journal of Otolaryngology, 39 (50). pp. 1-6. ISSN 2090-8539

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Abstract

Background Cholesteatoma is an atticoantral disease that potentially causes life-threatening complications. Therefore, canal wall down mastoidectomy is a well-established technique to eradicate the disease, especially in extensive cholesteatoma. Aim To evaluate the status of dry ear and hearing outcome post-retrograde canal wall down mastoidectomy. Methods A retrospective study of patients with cholesteatoma who underwent modifed radical mastoidectomy (MRM), a form of canal wall down mastoidectomy between January 2014 and December 2018. Results Fifty-seven patients were included with a mean age of 40 years. The majority of cases were adults, 86%, and 14% were children. Most of them complained of ear discharge (73.7%), followed by hearing loss (31.6%). Intraoperatively, cholesteatoma was primarily found in cases involving mastoid air cells, antrum, attic, and mesotympanum (47.4%). The presence of granulation tissue with cholesteatoma was noted in 57.9% of cases. Furthermore, 73.7 % of ossicular chain erosion cases involved erosion of all ossicles (47.6 %). In 26.3 % of cases, tegmen erosion was identifed. Facial canal dehiscence accounted for 15.8% of MRM cases, sclerotic mastoid was noted for 10.5%, and lateral semicircular canal dehiscence involved 5.3%. Up to 3 months of follow-up post-MRM showed 70.2% had a dry ear. After 6 months, there were 15.8% complaints of ear discharge in the subsequent follow-up. In this study, 33 out of 57 patients underwent a postoperative hearing evaluation, and 21.2 % of patients showed an improvement in the air-bone gap. Conclusion Canal wall down mastoidectomy is a treatment of choice in extensive cholesteatoma to achieve a dry and safe ear with maintaining functional hearing outcomes.

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