Axial computed tomography images of cholesteatoma

(A) Axial CT of a small congential cholesteatoma near the eustachian tube orifice (arrows).
(B) Axial CT of moderate-sized congenital cholesteatoma (arrows) deep to the ossicles in the attic.
(C) Axial CT of a large cholesteatoma of the mastoid. Arrows outline area of destruction. Asterix shows a breach of the mastoid cortex by infection with subperiosteal abscess.