RESULTS
Participants
A total of 90 ears underwent mastoidectomies for primary middle ear cholesteatomas during the 8-year period. 5% (5/90) had bilateral cholesteatomas. 15% (14/90) of ears in 13 patients were found to have LFs intraoperatively, with an equal number of left and right sided LFs. 54% (7/13) of patients were male and 69% (9/13) were Chinese. Mean age of diagnosis was 52 years (19.6, 8-6).