Soft tissue attenuation in middle ear on HRCT: Pictorial review

Anbarasu, Arangasamy; Chandrasekaran, Kiruthika; Balakrishnan, Sivasubramanian

doi:10.4103/0971-3026.111483

Cited by 13 publications

(12 citation statements)

References 12 publications

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“…The classical features of cholesteatoma are found in only about 50% of the cases. 9 In present study, the preoperative HRCT of temporal bone diagnosed soft tissue attenuation in all 35 cases (100%). In a study by Prata et al, the sensitivity of HRCT in detecting cholesteatoma was 72.73% 10 .…”

Section: Discussionsupporting

confidence: 56%

A study of the correlation between the pre-operative high resolution computed tomography findings and intra-operative findings in chronic otitis media-squamosal type

Pillai

Reynolds

Tom

2020

Int J Otorhinolaryngol Head Neck Surg

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Background: Chronic otitis media (COM) is characterized by ear discharge and hearing loss. There are two types of COM depending on the presence or absence of cholesteatoma. COM with cholesteatoma is termed as COM squamosal type and COM without cholesteatoma is termed COM mucosal type. COM squamosal type is associated with potential complications. If cholesteatoma is detected early, less invasive surgical methods can be used for hearing preservation and make ear safe from recurrent infections. A proper clinical examination can most often diagnose a cholesteatoma but require a high resolution computed tomography (HRCT) scan to assess the extent of the disease and potential complications. But most often the intra operative findings may not correlate with the HRCT findings. The aim of the study was to evaluate the clinical presentation of COM squamosal disease, preoperative HRCT and intra-operative findings and formulate a proper surgical intervention to avoid complications. Methods: This is a comparative study of the pre-operative HRCT and intra-operative findings in COM squamosal type. In the present study of 35 patients with squamosal disease, the HRCT findings were compared with intra-operative findings.Results: The study showed a good correlation between pre-operative HRCT of temporal bone and intra operative finding. The findings are statistically significant (p<0.001).Conclusions: The study shows a good correlation between pre-operative HRCT temporal bone and intra-operative findings.

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Section: Discussionsupporting

confidence: 56%

A study of the correlation between the pre-operative high resolution computed tomography findings and intra-operative findings in chronic otitis media-squamosal type

Pillai

Reynolds

Tom

2020

Int J Otorhinolaryngol Head Neck Surg

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“…2,3,7 HRCT using the "bone algorithm" without intravenous contrast is used for the evaluation of middle ear soft tissue except in cases of suspected vascular abnormality, a tumor, or other enhancing lesion such as an intracranial abscess which may required intravenous contrast administration prior to HRCT. 9 Temporal bone tumours usually appear as isodense to slightly hypodense lesions compared to adjacent brain, on HRCT. 2 Guilford and Alford coined the term glomus tympanicum to describe those paragangliomas limited to the middle ear.…”

Section: Discussionmentioning

confidence: 99%

High resolution computed tomography of temporal bone in the evaluation of otologic diseases

Handi¹,

Patil

Nisha

2017

Int J Otorhinolaryngol Head Neck Surg

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INTRODUCTIONDue to the complex anatomy of the temporal bone, conventional radiological methods like X-ray mastoid have limited ability to delineate the details of the temporal bone and cochlea-vestibular anatomy and disease pathology. The availability of modern highresolution computerized tomography (HRCT) scanners has resulted in ability to demonstrate the detailed temporal bone anatomy and identify significant structures and has revolutionalized the role of radiology in diagnosis and management of temporal bone diseases. 1 HRCT is particularly helpful in evaluating the anatomy and pathology of external auditory canal, middle ear cavity, vestibular aqueduct, tegmen tympani, sigmoid sinus plate, vertical segment of facial nerve canal, sinodural angle, carotid canal, jugular fossa, infra and supralabrynthine air cells and temporomandibular joint; both soft tissue extension and significantly sensitive ABSTRACT Background: Conventional radiological methods like X-ray mastoid have limited ability to delineate the details of the complex temporal bone and cochlea-vestibular anatomy and disease pathology. This can be overcome by the use of High resolution computed tomography (HRCT) evaluation of the temporal bone. HRCT is helpful in evaluating the anatomy and pathology type and extent of disease, thereby helps in preoperative planning. Methods: The CT scan of forty five patients attending the outpatient department of otorhinolaryngology in a tertiary care centre between August 2014 to August 2017 was evaluated in this study. Each CT scan was interpreted by an otolaryngologist and a radiologist and interpretation was by consensus. The data collected was evaluated and results are reported as rates and proportions (%). Results:The study evaluated CT scan of 45 patients of which 35 were male patients and 10 were female patients with age ranging from 5 years to 75 years. Most of these patients belonged to the 21-30, 31-40 age groups [9 (20%) in each group]. Infections of middle ear cleft (all with cholesteatoma), fractures of the temporal bone, anomalies and tumors of the external auditory canal and middle ear were the pathologies observed in these CT scans with infection (otomastoiditis) [23 (51.1%)] being the most common pathology observed. Conclusions: Pre-operative CT scan may not only help in identifying the nature, extent of infectious disease including ossicular, bony erosions; it may also identify anomalies in the temporal bone and surrounding structures. Thus, HRCT temporal bone will help the surgeon in planning effective surgical strategy, reducing morbidity during the surgery.

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“…Congenital cholesteatoma (CC) develops from the embryonic epithelial rest which is most commonly located in the temporal bone but can be present elsewhere in the skull, including skin [ 8 , 11 ]. Unlike the acquired type, CC ( Figure 4 ) is not a sequelae of CSOM; nonetheless, it needs to be mentioned due to similar imaging findings [ 12 , 13 ].…”

Section: Imaging Modalities For the Evaluation Of Csom [ 5 mentioning

confidence: 99%

“…Apart from the location of cholesteatoma with respect to the TM, it is also important to note its relation to the ear ossicles, i.e. medial or lateral, which is extremely helpful in determining the surgical approach [ 12 ]. Besides, due to a better preoperative extent delineation, HRCT improves the surgeon’s confidence in the preoperative counselling for various ancillary surgical procedures such as mastoidectomy or removal of ossicles [ 13 ].…”

Section: Imaging Modalities For the Evaluation Of Csom [ 5 mentioning

confidence: 99%

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Chronically Discharging Ears: Evalution with High Resolution Computed Tomography

2018

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SummaryChronic suppurative otitis media (CSOM) refers to the middle ear inflammation which is clinically characterized by the discharging ear, hearing deficit, fever and otalgia. Although a clinical diagnosis, imaging is imperative to rule out associated complications which apart from causing hearing deficit, may prove fatal at times.Both high resolution computed tomography (HRCT) and MRI are helpful in evaluating middle ear pathologies, usage being indication specific. Due to its excellent spatial resolution, HRCT is invaluable in assessment of chronically discharging ears, especially to look for bone erosion and the integrity of the ossicles. Due to its better spatial resolution, HRCT is preferred in suspected intra temporal complications whereas MRI is more useful in evaluating intracranial extension.

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Soft tissue attenuation in middle ear on HRCT: Pictorial review

Cited by 13 publications

References 12 publications

A study of the correlation between the pre-operative high resolution computed tomography findings and intra-operative findings in chronic otitis media-squamosal type

A study of the correlation between the pre-operative high resolution computed tomography findings and intra-operative findings in chronic otitis media-squamosal type

High resolution computed tomography of temporal bone in the evaluation of otologic diseases

Chronically Discharging Ears: Evalution with High Resolution Computed Tomography

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