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FIG 4. Absence of all cochlear turns with presence of only rudimentary bud-like cavity connected to vestibule was categorized as common cavity.
A and B, Axial view CT scans of the temporal bone show pronounced anteromedial facial nerve migration bilaterally (black arrowheads), with widening of Bill's bar (small black arrow) in a patient with a common cavity deformity bilaterally (large black arrows). (Same scale as that shown in fig 1.)
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