[Intrapetrous cholesteatoma. Apropos of 42 cases].

Cholesteatomas of the temporal bone are lesions which exceed the classical limitations of cholesteatoma middle ear. Certain raise the problem on their acquired or congenital origin. All require delicate but obligatory surgical treatment using various techniques and approach of oto-neurosurgery. Forty-two cases are studied here, bringing together the series from the Grenoble University Hospital.