a1 The Ear Pathology Research Laboratory, Departments of Otolaryngology and Pathology, University of Toronto, Toronto, Ontario, Canada.
Perforation of the tympanic membrane is a frequent complication of surgery for exostoses of the external auditory canal We report an unusual histopathological finding in a temporal bone containing external canal exostoses which suggests that some of these perforations may be unavoidable.
(Accepted June 28 1991)
c1 39 Beech Road, Stockport, Cheshire SK3 8HD.
* Research Fellow