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Anatomical variations of the temporal bone on high-resolution computed tomography imaging: how common are they?

Published online by Cambridge University Press:  15 June 2015

V Visvanathan  and
M S C Morrissey
V Visvanathan*
Affiliation:
Department of ENT/ Head and Neck Surgery, NHS Greater Glasgow and Clyde, Glasgow, Scotland, UK
M S C Morrissey
Affiliation:
Department of ENT, Royal Hospital for Sick Children, Glasgow, Scotland, UK
*
Address for correspondence: Mr V Visvanathan, Department of ENT/ Head and Neck Surgery, NHS Greater Glasgow and Clyde, Glasgow, Scotland, UK E-mail: vikranth@hotmail.co.uk
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Abstract

Objectives:

This study aimed to evaluate the prevalence of normal variations of temporal bone anatomy on high-resolution computed tomography imaging and report their clinical importance.

Methods:

A retrospective review was conducted of high-resolution temporal bone computed tomography imaging performed at NHS Greater Glasgow and Clyde over an eight-year period. The presence of five variants was determined. These variants were: a high dehiscent jugular bulb, an anteriorly located sigmoid sinus, a deep sinus tympani, an enlarged cochlear aqueduct and a large internal auditory meatus.

Results:

A total of 339 temporal bones were examined. The incidences of a high dehiscent jugular bulb, anteriorly located sigmoid sinus, deep sinus tympani, enlarged cochlear aqueduct and an enlarged internal auditory meatus were 2.76 per cent, 2.94 per cent, 5.01 per cent, 0.58 per cent and 1.76 per cent respectively.

Conclusion:

Anatomical variations of the temporal bone are not uncommon and it is important for the investigating otologist to be aware of such variations prior to undertaking surgery.

Keywords

Temporal BoneRadiologyAnatomy

Information

Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 129 , Issue 7 , July 2015 , pp. 634 - 637
Copyright
Copyright © JLO (1984) Limited 2015 

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References

1Tatlipinar, A, Tuncel, A, Öğredik, EA, Gökçeer, T, Uslu, C. The role of computed tomography scanning in chronic otitis media. Eur Arch Otorhinolaryngol 2012;269:33–8CrossRefGoogle ScholarPubMed
2Jackler, RK, Dillon, WO, Schindler, RA. Computed tomography in suppurative ear disease: a correlation of surgical and radiographic findings. Laryngoscope 1984;94:746–52CrossRefGoogle ScholarPubMed
3Moreano, EH, Paparella, MM, Zelterman, D, Goycoolea, MV. Prevalence of facial canal dehiscence and of persistent stapedial artery in the human middle ear: a report of 1000 temporal bones. Laryngoscope 1994;104:309–20CrossRefGoogle ScholarPubMed
4Brennan, P, Walsh, M. The role of computerized tomography in the preoperative assessment of chronic suppurative otitis media. Clin Otolaryngol Allied Sci 2002;27:95–7Google Scholar
5Subotić, R. The high position of the jugular bulb. Acta Otolaryngol 1979;87:340–4CrossRefGoogle ScholarPubMed
6Potter, GD. The ear, the surgeon and the radiologist. Hickey lecture, 1973. Am J Roentgenol Radium Ther Nucl Med 1973;118:501–10CrossRefGoogle ScholarPubMed
7Saito, R, Igarashi, M, Alford, BR, Guilford, FR. Anatomical measurement of the sinus tympani. A study of horizontal serial sections of the human temporal bone. Arch Otolaryngol 1971;94:418–25CrossRefGoogle ScholarPubMed
8Mukherji, SK, Baggett, HC, Alley, J, Carrasco, VH. Enlarged cochlear aqueduct. Am J Neuroradiol 1998;19:330–2Google ScholarPubMed
9Ebenius, B. The results of examination of the petrous bone in auditory nerve tumours. Acta Radiologica 1934;15:284–90CrossRefGoogle Scholar
10Moore, P. The high jugular bulb in ear surgery: three case reports and a review of the literature. J Laryngol Otol 1994;108:772–5CrossRefGoogle Scholar
11Koesling, S, Kunkel, P, Schul, T. Vascular anomalies, sutures and small canals of the temporal bone on axial CT. Eur J Radiol 2005;54:335–43CrossRefGoogle ScholarPubMed
12Ball, M, Elloy, M, Vaidhyanath, R, Pau, H. Beware of the silent presentation of a high and dehiscent jugular bulb in the external ear canal. J Laryngol Otol 2010;124:790–2CrossRefGoogle ScholarPubMed
13Niemczyk, K, Bruzgielewicz, A, Wysocki, J, Nitek, S, Olesinski, T. Sinus tympani in surgery of the middle ear and skull base [in Polish]. Otolaryngol Pol 2003;57:65–8Google Scholar
14Nitek, S, Wysocki, J, Niemczyk, K, Ungier, E. The anatomy of the tympanic sinus. Folia Morphol (Warsz) 2006;65:195–9Google ScholarPubMed
15Jackler, RK, Hwang, PH. Enlargement of the cochlear aqueduct: fact or fiction? Otolaryngol Head Neck Surg 1993;109:14–25CrossRefGoogle ScholarPubMed
16Valvassori, GE. The radiological diagnosis of acoustic neuromas. Arch Otolaryngol 1966;83:582–7CrossRefGoogle ScholarPubMed
17Migirov, L. Patulous internal auditory canal. Arch Otolaryngol Head Neck Surg 2003;129:992–3CrossRefGoogle ScholarPubMed
18Weinberg, PE, Kim, KS, Gore, RM. Unilateral enlargement of the internal auditory canal: a developmental variant. Surg Neurol 1981;15:39–42CrossRefGoogle ScholarPubMed