CT Temporal Bone Anatomical Variations
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: CT.
- Who it may be relevant to
- Registry conditions: Temporal Bone Abnormalities. Basic parameters: from 12 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
This study aimed to identify the prevalence of normal variations of temporal bone anatomy on high-resolution CT imaging and discuss their clinical importance
Detailed description
The temporal bone has a difficult anatomical structure for otologists and radiologists.In addition to its anatomical complexity, variations in the three-dimensional relationships of structures within the temporal bone need additional attention. The assessment of these relationships is of primary importance in diagnosis, treatment planning, and preoperative management. High-resolution computed tomography (CT) helps locate the anatomical structures within the temporal bone. Preoperative knowledge of the courses of vascular structures within and neighboring the temporal bone is of primary importance. If not detected preoperatively, variations in the localizations of the vascular structures may lead to disastrous consequences during surgery. The surgically important positions of the vascular structures that are generally accepted as normal variants are, High-resolution CT has made it possible for clinicians to study middle- and inner-ear pathology before undertaking surgery. This is particularly useful when the disease has altered the anatomy, resulting in complications such as a lateral canal fistula and facial canal or tegmen erosion there have been several studies reporting the value of high-resolution CT for investigations of cholesteatoma, temporal bone tumors, and congenital anomalies studies on the prevalence of normal anatomical variations of the temporal bone as the use of high-resolution CT imaging for temporal bone investigations is now widespread, it is necessary for the investigating otologist to be aware of common anatomical variations and their clinical implications
Interventions
- Radiation CT
Patients with unilateral ear pathology will be randomly assigned to do CT temporal bone, 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 an enlarged internal auditory meatus (IAM). A GE LightSpeed 16, four-slice, helical CT scanner (Fairfield, Connecticut, USA) was used for all patients. The scan parameters were as follows: 1 mm slices, smart Ma (50-250
Primary outcome measures
- Radiological evaluation of the anatomical variations of the Temporal bone [Time frame: Baseline]
Eligibility criteria
Inclusion criteria
\- All adult patients presented with any middle ear pathology indicated for temporal bone radiological evaluation and were willing to participate in the study
Exclusion criteria
\- 1- patients with temporal bone neoplastic disorders distorting normal temporal bone anatomy.
2- Extensive trauma to the temporal bone 3- Patients with congenital anomalies and craniofacial disproportions 4- Patients with mastoid surgery 5- Patients in whom radiological evaluation is contraindicated
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Other
Study locations
Center list to be confirmed — check the primary protocol.
Publications
- Walshe P, McConn Walsh R, Brennan P, Walsh M. The role of computerized tomography in the preoperative assessment of chronic suppurative otitis media. Clin Otolaryngol Allied Sci. 2002 Apr;27(2):95-7. doi: 10.1046/j.1365-2273.2002.00538.x. PMID 11994113
- Visvanathan V, Morrissey MS. Anatomical variations of the temporal bone on high-resolution computed tomography imaging: how common are they? J Laryngol Otol. 2015 Jul;129(7):634-7. doi: 10.1017/S0022215115001115. Epub 2015 Jun 15. PMID 26072959
- Atilla S, Akpek S, Uslu S, Ilgit ET, Isik S. Computed tomographic evaluation of surgically significant vascular variations related with the temporal bone. Eur J Radiol. 1995 May;20(1):52-6. doi: 10.1016/0720-048x(95)00619-2. PMID 7556255
- Tatlipinar A, Tuncel A, Ogredik EA, Gokceer T, Uslu C. The role of computed tomography scanning in chronic otitis media. Eur Arch Otorhinolaryngol. 2012 Jan;269(1):33-8. doi: 10.1007/s00405-011-1577-z. Epub 2011 Mar 24. PMID 21431950
- Jackler RK, Dillon WP, Schindler RA. Computed tomography in suppurative ear disease: a correlation of surgical and radiographic findings. Laryngoscope. 1984 Jun;94(6):746-52. doi: 10.1288/00005537-198406000-00004. PMID 6727511
Identifiers
NCT: NCT06597877 · CT Temporal bone variations