Temporal Bone Pathology in Congenital Anomalies of the Oval Window and the Facial Nerve

Saito, Ryusuke; Watanabe, Shuichi; Fujita, Akira; Fujimoto, Akiko; Inokuchi, Ikuo; Ogura, Yuichiro

doi:10.1016/s0385-8146(85)80012-2

Cited by 9 publications

(7 citation statements)

References 5 publications

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“…Major anatomical variants of the CT are reportedly rare, except in association with severe congenital ear anomalies [1,8,21]. However, the PC was absent in one of 40 specimens in this study; this has not previously been described in an otherwise normal temporal bone.…”

Section: Discussioncontrasting

confidence: 52%

Surgical anatomy of the chorda tympani: a micro-CT study

2012

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Section: Discussioncontrasting

confidence: 52%

Surgical anatomy of the chorda tympani: a micro-CT study

2012

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“…However, it is not completely dependent to the ossification process [7]. Abnormal course of the facial canal is expected in malformed temporal bones and the nerve can be exposed [8]. But, the fibrous layers surrounding the facial nerve seem to be responsible for the final architecture of the facial canal.…”

Section: Discussionmentioning

confidence: 99%

The Dehiscent Facial Nerve Canal

Yetışer

2012

International Journal of Otolaryngology

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Accidental injury to the facial nerve where the bony canal defects are present may result with facial nerve dysfunction during otological surgery. Therefore, it is critical to know the incidence and the type of facial nerve dehiscences in the presence of normal development of the facial canal. The aim of this study is to review the site and the type of such bony defects in 144 patients operated for facial paralysis, myringoplasty, stapedotomy, middle ear exploration for sudden hearing loss, and so forth, other than chronic suppurative otitis media with or without cholesteatoma, middle ear tumors, and anomaly. Correlation of intraoperative findings with preoperative computerized tomography was also analyzed in 35 patients. Conclusively, one out of every 10 surgical cases may have dehiscence of the facial canal which has to be always borne in mind during surgical manipulation of the middle ear. Computerized tomography has some limitations to evaluate the dehiscent facial canal due to high false negative and positive rates.

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“…All or part of the chorda tympani may be duplicate; if one of these nerves arises extratemporally, it may enter the temporal bone by its own separate foramen rather than via the stylomastoid foramen 21 . We found only one reference to complete absence of the chorda tympani; this was in children with severe ear anomalies 47 …”

Section: Other Anatomical Variantsmentioning

confidence: 71%