Cholesteatoma

  • Etiology: nondependent soft tissue in middle ear + mastoid antrum
  • Imaging: erosion of ossicles / scutum / choclear promontory / facial nerve canal, opacification of mastoid antrum, erosion of mastoid air cells + squamosal temporal bone
  • MRI: identical to epidermoid (T1 hypointense, T2 hyperintense, restricted diffusion

Cases of Cholesteatoma