FIG 5. CT scans of Mondini malformations.

A and B, Axial view CT scans obtained through the temporal bone show Mondini malformations of the cochlea bilaterally, with lack of separation of the second and third turns (black arrowheads).

C and D, Axial view CT scans of the same patient, obtained more cephalad, show normal origins of the facial nerves from the internal auditory canals bilaterally (black arrowheads). Note also prominent vestibules (large black arrows) and enlarged right vestibular aqueduct (small black arrow). (Same scale as that shown in fig 1.)