2.1 Reporting guideline
A phenomenon of extensive ossification over the lateral semicircular
canal was found in clinic. Due to the difficulty in intraoperative
identification, iatrogenic injury was easy to occur. This phenomenon is
not common in clinical practice by literature review. All surgical cases
(156 cases) of chronic otitis media and cholesteatoma in the past 3
years were further reviewed and 7 of them were found. The clinical
characteristics of these 7 cases were reviewed in order to provide
clinical experience for preoperative recognition and intraoperative
management.