所見
- LEFT
- Mild soft tissue narrowing of the cartilaginous external auditory canal
- Trace soft tissue or fluid at the stapes footplate
- Abnormal down-sloping course of the tympanic segment of the facial nerve with abnormally anterior course of the mastoid segment
- Common vestibulocochlear cavity with dysmorphic semicircular canals and no discernible internal cochlear architecture
- RIGHT
- Mild soft tissue narrowing of the cartilaginous external auditory canal
- Mildly dysplastic appearance of the stapes
- Abnormal down-sloping course of the tympanic segment of the facial nerve
- Hypoplastic cochlea with normal basal turn but hypoplastic middle and apical turns
- Mildly dilated vestibule with well-formed and covered semicircular canals
診断
Common cavity malformation
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鑑別診断
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臨床のポイント
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考察
参考文献