Evaluation of embryological sequences of ear anomalies and its radiological relevance

Amarnath, Chandramouli; Gnanasigamani, Sathyan; Soniya, R; Periakaruppan, A.; Shankar, Kruthika

doi:10.4103/0971-7749.192171

Cited by 8 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pinna starts developing in the fifth week from six hillocks of His which are the mesenchymal proliferations of the first and second pharyngeal arches. 3 The first arch gives rise to the tragus and superior portion of the helix, whereas the second arch contributes to antihelix, antitragus, and lobule. 4 The development of auricle is completed by the 20th week of gestation.…”

Section: Discussionmentioning

confidence: 99%

“…4 The development of auricle is completed by the 20th week of gestation. 3 4 The first ectodermal cleft forms the EAC which invaginates medially to meet the endoderm of the middle ear. The mesodermal component gets entrapped leading to the formation of meatal plate.…”

Section: Discussionmentioning

confidence: 99%

“…This plate normally resorbs by the 28th week of gestation causing recanalization of EAC. 3 4 Failure of recanalization leads to congenital aural atresia.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Imaging in a Rare Case of Unilateral External and Middle Ear Anomalies Associated with Inner Ear Malformation

Joshi

Talreja

Rahatgaonkar

et al. 2021

Indian J Radiol Imaging

View full text Add to dashboard Cite

External ear malformations are commonly associated with middle ear malformations due to their closely related embryogenesis. Inner ear anomalies are less consistently seen due to their independent development. Cross-sectional imaging has come to play a critical role in the workup of congenital deafness in the pediatric age group. To optimize speech and language development, early diagnosis and treatment are very crucial. Identification of these anomalies is additionally important when operative intervention is being planned because they may complicate or perhaps preclude the surgery.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Imaging in a Rare Case of Unilateral External and Middle Ear Anomalies Associated with Inner Ear Malformation

Joshi

Talreja

Rahatgaonkar

et al. 2021

Indian J Radiol Imaging

View full text Add to dashboard Cite

show abstract

“…Thus any malformation in 2nd arch development results in anomalous facial nerve and facial nerve canal. 3,11,[13][14][15] All these presentations have to be timely diagnosed as the hearing can be restored in majority of the cases. Abnormality of malleus on otoscopic examination in such cases gives clue for the presence of other ossicular anomalies.…”

Section: Discussionmentioning

confidence: 99%

Isolated middle ear anomalies: unfamiliar causes of conductive hearing loss: a case series

Vijayendra¹,

Abhilasha²,

Vijayendra³

et al. 2020

Int J Otorhinolaryngol Head Neck Surg

View full text Add to dashboard Cite

<p class="abstract">In this paper, we highlighted on the various types of isolated congenital middle ear ossicular anomalies we had seen and managed. This is significant as these are rare and go undiagnosed for long period of time. The mainstay of managing these conditions includes proper and timely diagnosis and correction of conducting hearing loss. This was a retrospective case series study done over period of 3 years from July 2016 to June 2019 at a tertiary referral otology centre. The study comprised of 9 patients diagnosed with isolated middle ear anomalies and in total 11 operated ears for the same as two patients underwent bilateral treatment. Each case was handled differently according to the intra operative middle ear findings. We found that in all of our cases the HRCT findings were in correlation with our intra operative findings. All cases had excellent post-operative hearing outcomes. Isolated middle ear deformity even though rare to identity, with recent advancement it is possible to diagnose and treat it on time and hence reduce the disability experienced by the patient. Whatever the type of abnormalities, most of them could be corrected with appropriate ossicular reconstruction by preserving the normal existing anatomy and bypassing the anomalous part.</p><p> </p>

show abstract

“…15 In the current study, six cases (13.3%) were ear anomalies. EAC atresia with normal or hypoplastic middle ear was the most common anomaly in this study, which is in line with literature.…”

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

View full text Add to dashboard Cite

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.

show abstract

Evaluation of embryological sequences of ear anomalies and its radiological relevance

Cited by 8 publications

References 0 publications

Imaging in a Rare Case of Unilateral External and Middle Ear Anomalies Associated with Inner Ear Malformation

Imaging in a Rare Case of Unilateral External and Middle Ear Anomalies Associated with Inner Ear Malformation

Isolated middle ear anomalies: unfamiliar causes of conductive hearing loss: a case series

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

Contact Info

Product

Resources

About