"T1: low signal"
"T2: high signal"
"T1 C+ (Gd): no enhancement"
"DWI: diffusion restriction"
"Diffusion-weighted imaging is particularly useful when distinguishing a cholesteatoma from other middle ear masses. It is the only entity that demonstrates high signal intensity on DWI. However, the sequence is prone to artifact and care must be taken how the sequence is performed and interpreted 2. Non-echo planar DWI is superior for the diagnosis of cholesteatoma and is therefore preferred if it is available 8. DWI (especially non-EPI DWI) is particularly useful in cases of suspected post-surgical recurrence."
"post-inflammatory ossicular fixation"
"Post-operative"
"Diffusion-weighted imaging is particularly useful when distinguishing a cholesteatoma from other middle ear masses. It is the only entity that demonstrates high signal intensity on DWI. However, the sequence is prone to artifact and care must be taken how the sequence is performed and interpreted 2. Non-echo planar DWI is superior for the diagnosis of cholesteatoma and is therefore preferred if it is available 8. DWI (especially non-EPI DWI) is particularly useful in cases of suspected post-surgical recurrence."
"Langerhans cell histiocytosis"
Expected headings
"Signal characteristics"
"Post-operative"
"There are four hypotheses that relate to the formation of cholesteatomas; all may be true 1,6:"
"There are a number of subtypes of acquired cholesteatoma, classified by location 11:"
"There are four hypotheses that relate to the formation of cholesteatomas; all may be true 1,6:"
"Although MRI is unable to adequately delineate bony anatomy, it can potentially distinguish non-specific opacification from cholesteatomas. It is particularly useful in the postoperative setting when CT may be indeterminate, since granulation tissue, scarring and recurrent cholesteatoma may all appear similar 2."