Fig 11.

Recurrent cholesteatoma after surgery. A, Coronal HRCT scan shows the obliterated mastoidectomy cavity (white arrow). B, Coronal FIESTA image distinguishes the slightly hyperintense (to brain) cholesteatoma (thick white arrow on B, C, and D) from the strongly hyperintense granulation tissue (dashed arrow on B and C). C, Coronal contrast-enhanced MR image differentiates as well the nonenhancing cholesteatoma from the strongly enhancing granulation tissue. D, Coronal DWI with the intensive intralesional diffusion restriction supports the diagnosis. Note the susceptibility artifacts on the EPI-DWI (black arrow) on the right.