Middle Ear
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2021 ◽  
Vol 14 (12) ◽  
pp. e242607
Author(s):  
Jacob Seicshnaydre ◽  
Isaac Erbele ◽  
Stephen Hernandez ◽  
Moisés Arriaga

We report a case of a temporal bone pneumatocele with full-thickness erosion of the cranium associated with aggressive nose blowing. This condition presented 9 years after traumatic fracture of the temporal bone. There are 17 reported cases of mastoid sinus hyperpneumatisation in the literature. Eleven of the 17 are associated with Valsalva manoeuvres or elevated middle ear pressure. However, no other cases of full-thickness erosion at the site of a former fracture have been reported. We propose that the fracture, in combination with elevated mastoid sinus pressure from aggressive nose blowing, led to escape and trapping of pressurised air in the epidural and subcutaneous spaces, which resulted in bone erosion.


2021 ◽  
Vol 10 (23) ◽  
pp. 5603
Author(s):  
Krystyna Masna ◽  
Aleksander Zwierz ◽  
Krzysztof Domagalski ◽  
Paweł Burduk

Background: The purpose of this study is to analyze seasonal differences in adenoid size and related mucus levels via endoscopy, as well as to estimate changes in middle ear effusion via tympanometry. Methods: In 205 children with adenoid hypertrophy, endoscopic choanal assessment, adenoid hypertrophy assessment using the Bolesławska scale, and mucus coverage assessment using the MASNA scale were performed in two different thermal seasons, summer and winter. The study was conducted in two sequences of examination, summer to winter and winter to summer, constituting two separate groups. Additionally, in order to measure changes in middle ear effusion, tympanometry was performed. Results: Overall, 99 (48.29%) girls and 106 (51.71%) boys, age 2–12 (4.46 ± 1.56) were included in the study. The first group, examined in summer (S/W group), included 100 (48.78%) children, while the group first examined in winter (W/S group) contained 105 (51.22%) children. No significant relationship was observed between the respective degrees of adenoid hypertrophy as measures by the Bolesławska scale between the S/W and W/S groups in winter (p = 0.817) and in summer (p = 0.432). The degrees of mucus coverage of the adenoids using the MASNA scale and tympanograms were also comparable in summer (p = 0.382 and p = 0.757, respectively) and in winter (p = 0.315 and p = 0.252, respectively) between the S/W and W/S groups. In the total sample, analyses of the degrees of adenoid hypertrophy using the Bolesławska three-step scale for seasonality showed that patients analysed in the summer do not differ significantly when compared to patients analysed in the winter (4.39%/57.56%/38.05% vs. 4.88%/54.63%/40.49%, respectively; p = 0.565). In contrast, the amount of mucus on the adenoids increased in winter on the MASNA scale (p = 0.000759). In addition, the results of tympanometry showed deterioration of middle ear function in the winter (p = 0.0000149). Conclusions: The obtained results indicate that the thermal seasons did not influence the size of the pharyngeal tonsils. The increase and change in mucus coverage of the adenoids and deterioration of middle ear tympanometry in winter may be the cause of seasonal clinical deterioration in children, rather than tonsillar hypertrophy. The MASNA scale was found to be useful for comparing endoscopy results.


2021 ◽  
Author(s):  
Jake Leyhr ◽  
Laura Waldmann ◽  
Beata Filipek-Górniok ◽  
Hanqing Zhang ◽  
Amin Allalou ◽  
...  

The acquisition of movable jaws was a major event during vertebrate evolution. The role of NK3 homeobox 2 (Nkx3.2) transcription factor in patterning the primary jaw joint of gnathostomes (jawed vertebrates) is well known, however knowledge about its regulatory mechanism is lacking. In this study, we report a proximal enhancer element of Nkx3.2 that is deeply conserved in gnathostomes but undetectable in the jawless hagfish. This enhancer is active in the developing jaw joint region of the zebrafish Danio rerio, and was thus designated as jaw joint regulatory sequence 1 (JRS1). We further show that JRS1 enhancer sequences from a range of gnathostome species, including a chondrichthyan and mammals, have the same activity in the jaw joint as the native zebrafish enhancer, indicating a high degree of functional conservation despite the divergence of cartilaginous and bony fish lineages or the transition of the primary jaw joint into the middle ear of mammals. Finally, we show that deletion of JRS1 from the zebrafish genome using CRISPR/Cas9 leads to a transient jaw joint deformation and partial fusion. Emergence of this Nkx3.2 enhancer in early gnathostomes may have contributed to the origin and shaping of the articulating surfaces of vertebrate jaws.


Author(s):  
Pier Mario Biava ◽  
Stefano Ciaurelli ◽  
Riccardo Benzi Cibelli ◽  
Gianpaolo Pisano

Hearing dysfunctions can be classified by type, degree, configuration, time of onset, aetiology, and finally, consequences on speech development. They can be divided into conductive, mixed, central types and sensorineural. Conductive hearing loss (CHL) results from interference with the mechanical transmission of sound through the external and middle ear; it can be congenital, as a consequence of anatomic abnormalities, but it can commonly be acquired following middle ear inflammatory pathologies. Sensorineural hearing loss (SNHL) results from failure to transduce vibrations to neural impulses in the cochlean and is a consequence of an irreversible damage to the differentiated cells which make up the organ of hearing and the acoustic paths at various levels. Mixed hearing loss involves a combination of these two types in the same ear. Studies in neuroscience field have shown that the prevention of cell degeneration is only possible if all the factors taken at the different stages of stem cells’ multiplication and differentiation are administered together. We have demonstrated this in a recent study on the ability of SCDSFs to prevent neurodegeneration in hippocampal cells of the CA1 zone in mice. This study confirms previous findings demonstrating that early developmental zebrafish embryo extracts could act as a modulator of senescence in human mesenchymal stem cells (hMSC) isolated from many adult tissues. These findings have open a promising way for the approaches promoting the rejuvenation and regeneration of different tissues, by-passing stem cell transplantation. In the present clinical trial we have used SCDSFs to study the possible reversion of neurosensory hearing loss, until now considered an irreversible condition.


Author(s):  
Smita Soni ◽  
Anjali A. R. ◽  
Yashveer J. K.

<p><strong>Background:</strong> Chronic otitis media (COM) is a long-standing disease of middle ear cleft and mastoid cavity having a permanent perforation in the tympanic membrane with or without discharge. It’s a worldwide health problem and it is still predominant in the modern antibiotic era. Aim<strong> </strong>was to determine the prevalence and types of ossicular chain defect in mucosal and squamosal type of COM. Also, to evaluate the hearing loss in relation to ossicular chain defect.</p><p><strong>Methods:</strong> The study was prospective observational study conducted in Bhopal over the duration of one year (January 2019 to June 2020). Patient aged 11-70 years reporting with COM were included in the study. Details regarding sociodemographic profile and extensive examination were recorded. Data was entered into MS excel 2007, analysis was done.</p><p><strong>Results:</strong> It was more prevalent in the age groups of 21-30years (39%) with female (53%) preponderance. Right sided ear was commonly involved (58%). Majority of the patients had tubo-tympanic disease (62%) whereas 38% had attico-antral disease. Ossicular chain was found intact in 33% cases. Average hearing loss was maximum (67.6 dBHL) when all ossicles are eroded. Hearing loss was minimum (33.6 dBHL) with isolated handle of malleus involvement.</p><p><strong>Conclusions:</strong> COM is one of the commonest causes of preventable hearing impairment in our society, hence early diagnosis and timely intervention is needed. Awareness among patients and doctors regarding the need for better ear hygiene is necessary.</p>


Author(s):  
Muhammad Arif Sudianto Utama ◽  
Widodo Ario Kentjono ◽  
Haris Mayagung Ekorini

Abstract Introduction Adenoid hypertrophy is a change in adenoid size that can lead to obstruction the Eustachian tube and become a risk factor for otitis media effusion (OME) in children. Standard objective examination of adenoid hypertrophy uses adenoid-nasopharyngeal ratio (A-N ratio) based on correct lateral skull radiography. Adenoid hypertrophy is one of the factors causing OME in children. There is still much debate about the association between A-N ratio and tympanogram width (Tw). Determining the association of A-N ratio and Tw in adenoid hypertrophy patients. Methods Participants performed a true lateral radiographic examination using Fujioka method to determine A-N ratio, and Tw to determine middle-ear pressure. The distance between examination of A-N ratio and tympanogram examination was at maximum of ~1 week. The association between A-N ratio and Tw in patients with adenoid hypertrophy used the Pearson correlation test. This research employed significance level p < 0.05. Results Most participants were aged between 6 and 10 years (38.10%), male patients (57.14%), and the symptom most participants complained of was snoring during sleep (38.10%). Most participants had A-N ratio of 0.53 to 0.70 (61.90%) with an average of 0.60 ± 0.05. The average value of Tw measurement was 102.83 ± 50.03 daPa (r = 0.605; p < 0.001). Conclusion There is a significant association between A-N ratio base on true lateral radiographic examination and Tw in adenoid hypertrophy patients.


2021 ◽  
pp. 105566562110631
Author(s):  
Jiuli Zhao ◽  
Hengyuan Ma ◽  
Yongqian Wang ◽  
Tao Song ◽  
Di Wu ◽  
...  

Objective There have been few studies on the anatomy of palatine aponeurosis (PA). Herein, we elucidated the relationship between the PA and soft palate muscles and pharyngeal muscles. Design Two cadaveric specimens were dissected to observe the gross anatomy of the PA. Six cadaveric specimens were processed and scanned by micro-computed tomography to determine the elaborate anatomy. Images were exported to Mimics software to reconstruct a three-dimensional model. Results The PA covered the anterior (32.1%-38.8%) of the soft palate, extending from the tensor veli palatini (TVP) and connecting to 3 muscles: palatopharyngeus (PP), uvula muscle, and superior pharyngeal constrictor (SC). The SC and PP are attached to the PA on the medial side of the pterygoid hamulus. SC muscle fibers were attached to the hamulus, forming a distinct gap between the hamulus. Some muscle fibers of the PP and uvula originated from the PA. The PA extended from the TVP to the midline and the posterior edge of the hard palate. The PA was not uniformly distributed, which was complementary to the attached muscles in thickness. Conclusions PA, as a flexible fibrous membrane, maintains the shape of the soft palate. It extends from the TVP and covers anteriorly about one-third of the soft palate. The PA provides a platform for the soft palate muscles and pharyngeal muscles, connecting to the PP, uvula muscle, and SC. These muscles are important for palatopharyngeal closure and middle-ear function. It is necessary to minimize the damage to the PA during surgical interventions.


2021 ◽  
pp. 014556132110581
Author(s):  
Yuan-Jun Liu ◽  
Lin Han ◽  
Jie Cao ◽  
Hong-Wei Zheng ◽  
Li-Sheng Yu

Primary ectopic meningioma of the middle ear is relatively rare in clinical practice. It is often difficult to distinguish it from chronic otitis media or otitis media with effusion due to its similar and atypical clinical symptoms. We report a case of epithelial tympanic ectopic meningioma with the main complaints of otalgia, aural fullness, and hearing loss. It was accidentally discovered during tympanotomy due to the symptoms of recurring refractory secretory otitis media. This article briefly reviews the relevant literature in recent years, summarizes the characteristics of primary ectopic tympanic meningioma with intact tympanic membrane, and emphasizes the diagnosis and treatment strategy of the middle ear mass.


2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Fiona Alvin ◽  
François Simon ◽  
Françoise Denoyelle

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