CT report | n | % |
Normal | 83 | 71.6 |
Common cavity deformity | 1 | 0.9 |
Mondini | 3 | 2.6 |
Mondini and dilated vestibular aqueduct | 4 | 3.4 |
Dilated vestibular aqueduct | 6 | 5.1 |
Narrow IAM | 3 | 2.6 |
Abnormal vestibule/semicircular canals | 7 | 6.0 |
Abnormal cochlea, vestibule, and IAM | 5 | 4.3 |
Cerebral abnormalities | 1 | 0.9 |
Miscellaneous2-150 | 3 | 2.6 |
The common cavity deformity consists of absent or dilated cochlear basal coil widely communicating with the vestibule. “Mondini” describes a cochlea with a basal turn and a distal sac. Dilated vestibular aqueduct refers to middle third diameter of more than 1.5 mm.
↵2-150 Two cases with skull base deformity and one with high jugular bulb on one side.