Case of the Week
Section Editors: Matylda Machnowska1 and Anvita Pauranik2
1University of Toronto, Toronto, Ontario, Canada
2BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
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November 10, 2008
Acquired Middle Ear Cholesteatoma
- Soft tissue mass in middle ear with erosion of scutum, ossicles, tegmen, Koerner's septum, mastoid septae, and lateral bone covering of otic capsule, particularly horizontal semicircular canal.
- Cholesteatoma is bright on DWI and, thus, different from granulation, fibrous, inflammatory, and scar tissues; however, they need to be large to be visualized.
- Delayed (30-45 min) post contrast T1WI may be useful as cholesteatoma shows no or only marginal enhancement while other types of tissues enhance; delayed imaging is not practical, particularly in children.
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