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Introducción: La reconstrucción de la oreja en la actualidad es un problema difícil de solucionar. Se han propuesto varias técnicas quirúrgicas y solo las que se basan en el uso de cartílago costal autólogo son las que se aceptan a nivel mundial. Objetivo: Evaluar la efectividad de la técnica de reconstrucción del pabellón auricular descrita por Burt Brent. Métodos: Se realizó un estudio cuantitativo con diseño descriptivo de corte transversal con 41 pacientes que presentaron microtia congénita o perdida adquirida de la oreja; a quienes se les realizó reconstrucción auricular con cartílago costal autólogo tratados en el Hospital "William Soler", el Centro de Investigaciones Médico-Quirúrgica y Clínica Central "Cira García" en el Servicio de Cirugía Plástica desde 1994 hasta 2019. Se describió y se documentó la técnica empleada descrita por Burt Brent. Se utilizó una escala de 10 puntos que se basó en la anatomía auricular normal para la valoración de los resultados. Resultados: Se encontraron 32 pacientes portadores de microtia congénitas (78,04 %) y 9 pérdidas traumáticas (21,95 %), predominó el sexo femenino (56,09 %). La incidencia fue mayor en el lado derecho (68,75 %) en pacientes con microtia congénita. En el 95 % de los casos se alcanzaron resultados favorables y satisfactorios. Conclusiones: La reconstrucción del pabellón auricular requiere el empleo de un fragmento de cartílago costal de suficiente tamaño, forma y proyección. La clave consiste en esculpir un marco cartilaginoso de la oreja y mantener estos detalles a través de la piel lo más semejante a la oreja normal. Para un resultado satisfactorio se requiere una alta especialización.
Introduction: Auricle reconstruction is, nowadays, a difficult problem to solve. Several surgical techniques have been proposed and only those based on the use of autologous costal cartilage are accepted worldwide. Objective: To evaluate the effectiveness of the auricle reconstruction technique described by Burt Brent. Methods: A quantitative study with a cross-sectional descriptive design was carried out with 41 patients who presented congenital microtia or acquired loss of the ear and who were performed auricle reconstruction with autologous costal cartilage in the plastic surgery service at Hospital "William Soler", Centro de Investigaciones Médico-Quirúrgicas and Clínica Central "Cira García", from 1994 to 2019. The used technique described by Burt Brent was, in turn, described and documented. A 10-point scale based on the normal atrial anatomy was used to assess the outcomes. Results: Thirty-two patients with congenital microtia (78.04 %) and nine traumatic losses (21.95 %) were found, with a predominance of the female sex (56.09 %). The incidence was higher on the right side (68.75 %) in patients with congenital microtia. Favorable and satisfactory outcomes were achieved in 95 % of cases. Conclusions: Auricle reconstruction requires the use of a costal cartilage piece of enough size, shape and projection. The key is to sculpt a cartilaginous framework of the ear and to maintain these details through the skin as close as possible to the normal ear. A high level of specialization is required for a satisfactory outcome.
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Humans , Costal Cartilage/injuries , Epidemiology, Descriptive , Cross-Sectional StudiesABSTRACT
Objective:To establish silicone cartilage models of donor-sites for the microtia patients by using digital technology, and to explore the application of surgical simulation in auricular reconstruction.Methods:From June 2018 to October 2019, 19 congenital microtia patients underwent thoracic CT scans and following three-dimensional costal cartilage imaging with Mimics software at the Nanfang Hospital, Southern Medical University. Among these patients, 16 were males and 3 were females. The mean age of patients was 16 years (range 8 to 35 years). Silicon cartilage models were produced by 3D printing and used for surgical planning and preoperative simulation in ear framework fabrication. Cartilaginous framework was sculptured according to the simulation during operation. Patients were followed up for a minimum of six months to evaluate the size, outline, height and auriculocephalic angle of the reconstructed ear. The satisfactory outcomes of the patients were scored according to a 5-point Likert scale.Results:All the patients received the surgical simulation and sculpture training with silicone cartilage models before operation. Auricular reconstruction was completed successfully according to the simulation. The duration of sculpture was shortened to 1-1.5 hours. There were no serious complications, such as hematoma, inflammation, skin necrosis and framework exposure. The contour of reconstructed ear was natural and clear over a 6 months follow-up, and all the patients were satisfied with their surgical outcomes.Conclusions:With the application of digital technology and silicone cartilage models by 3D printing to the surgical planning and training in microtia patients, patient-specific framework is fabricated with precisely assembling, which not only shortens the operation time, but also provides the unexperienced surgeons with a safe and effective training of ear framework fabrication.
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Objective@#To investigate the association between ABO blood-group system and congenital microtia.@*Methods@#Patients with congenital microtia treated in the Plastic Surgery Hospital of the Chinese Academy of Medical Sciences from January 1, 2017 to February 28, 2019 were collected as the case group. Non-malformed patients admitted to the same hospital from January 1, 2017 to February 28, 2019 were collected as the control group. ABO blood group was determined by tube agglutination test. The distribution of ABO blood group in both group was counted and Chi-square test was used for statistical analysis with a significance level α=0.05. Then spilt chi-square test was applied to compare the difference between blood groups using Bonferroni correction for multiple comparisons (significance level α′=0.008 3) if a statistically significant difference was found in chi-square test. Odds ratio (OR) and its 95% confidence intervals (CI) were calculated to compare the association between ABO blood group and risk of microtia by using Woolf’s method . All statistical analysis was performed with SPSS version 25.0.@*Results@#2 317 patients with congenital microtia (case group) and 5 411 patients without malformation (control group) were included in this study. The distribution of ABO blood types in congenital microtia group was 29.39% (681/2 317) for type A, 31.89% (739/2 317) for type B, 9.75% (226/2 317) for type AB, and 28.97% (671/2 317) for type O. The distribution of blood group was B>A>O>AB. While, the distribution of blood groups in the control group was O>B>A>AB, which was statistically different from the congenital microtia group (χ2=8.387, P=0.039). The incidence of congenital microtia differed significantly between A blood group and O blood group (χ2=7.448, P=0.006). The risk of congenital microtia was significantly lower in blood group O (OR=0.863, 95% CI: 0.776-0.960, P=0.007) and relatively higher in blood group A (OR=1.110, 95% CI: 0.997-1.236).@*Conclusions@#In the population managed in the Plastic Surgery Hospital of the Chinese Academy of Medical Sciences, ABO blood group is correlated with the occurrence of congenital microtia. O blood group is a potential protective factor. While A blood group is susceptible to congenital microtia.
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Objective@#This study collected and analyzed data from patients with microtia in multiple clinical centers to obtain the incidence characteristics of microtia in Chinese.@*Methods@#Data from 746 patients with microtia were collected from six hospitals, including theThird Hospital of Hebei Medical University, Hunan Provincial People′s Hospital, the Second Hospital of Hebei Medical University, Weihai Municipal Hospital, West China Hospital Sichuan University, Plastic Surgery Hospital, Chinese Academy of Medical Sciences from January 2016 to December 2017. These data included the results of physical examination and the results of auxiliary examination such as electrocardiogram, chest CT, and abdominal ultrasound. Then, the accompanying malformations of the microtia were statistically analyzed and discussed. Data were entered and processed using SPSS 19.0 statistical software. The relationship between microtia deformities and associated malformations was analyzed by Pearson χ2 test. P<0.05 was considered statistically significant.@*Results@#A total of 746 patients with microtia were included, including 513 males and 233 females, aged 5-27 years old. There were 678 cases of unilateral microtia, 68 cases of bilateral microtia; 128 cases of Ⅰ degree, 564 cases of Ⅱ degree, and 54 cases of Ⅲ degree. In addition, 336 cases (45%) were associated with dysplasia of other systems. Detected anomalies were 321 cases of the ear, face, and neck, 261 cases of musculoskeletal system and 76 cases of cardiovascular system, 30 cases of anomalies of the urogenital system, eye, 27 cases of respiratory system, 7 cases of central nervous system, 5 case of digestive system and 1case of diaphragmatic hernia. The proportion of male and female with microtia was 47.0% (241/513) and 40.8% (95/233), respectively, and there was no significant difference in between (χ2=2.493, P=0.114); The composition ratios of unilateral and bilateral associated malformations were 45.7% (310/678) and 38.2% (26/68 ), and there was no significant difference in between (χ2=1.400, P=0.237); The composition ratios of Ⅰ, Ⅱ, Ⅲ degree-associated malformations were 39.8% (51/128), 42.6% (240/564), and 83.3% (45/54), and the difference was statistically significant (χ2= 34.794, P<0.001).@*Conclusions@#Microtia has significant clinical heterogeneity with a higher proportion of associated malformations. A higher incidence of associated deformities in patients with severe microtia was observed. Systematic examination is required, which will be helpful to clinical therapy and etiology analysis.
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OBJECTIVES: The aim of this study was to analyze the incidence of inner ear anomalies in patients with unilateral congenital aural atresia (CAA) combined with microtia. METHODS: We retrospectively reviewed 61 patients with unilateral CAA combined with microtia who underwent high-resolution temporal bone computed tomography (TBCT) and hearing examination. Inner ear anomalies were analyzed using TBCT and evaluated according to the Jahrsdoerfer grading system, Marx classification, and extent of inferior displacement of the mastoid tegmen. RESULTS: Inner ear anomalies were observed in 14 patients (23.0%). Lateral semicircular canal (LSCC) dysplasia was the most common inner ear anomaly, with an incidence of 16.4%. The incidence was significantly higher on the pathologic side than on the unaffected side (P=0.002). All vascular anomalies were observed in the high-riding jugular bulb, with an incidence of 24.6%. The incidence was significantly higher on the pathologic side than on the unaffected side (P<0.001). LSCC dysplasia was significantly more common in patients with a lower Jahrsdoerfer score (odds ratio, 0.66; P=0.004). CONCLUSION: The incidence of inner ear anomalies was relatively high in patients with unilateral CAA combined with microtia; LSCC dysplasia was the most common anomaly and the probability of coexistence was higher in patients with a lower Jahrsdoerfer score.
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Humans , Classification , Congenital Microtia , Ear, Inner , Hearing , Incidence , Mastoid , Retrospective Studies , Semicircular Canals , Temporal BoneABSTRACT
The occurrence and development of congenital microtia are the result of multiple factors and mechanisms, including genetic factors, living environment and lifestyle, etc. However, genetics is the key to understand the etiology of congenital microtia. In this paper, the genetics of microtia was reviewed in the aspects of epigenetics, gene polymorphism, chromosomal change, genetic change and signal pathway. The etiology of microtia was discussed and summarized.
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Objective@#To explore the effect of applying the digital technology in the reconstruction of congenital microtia.@*Methods@#CT data of 40 patients with congenital microtia were collected by using software (Mimics 17.01) and three-dimensional printing. And the three-dimensional reconstruction of costal cartilage and ear model was performed. The effectiveness and feasibility of the digital assisted technology in the reconstruction of congenital microtia could be established, by contrasting the pre-three-dimensional reconstruction and the morphology of the costal cartilage harvested during surgery and comparing the imaging data of the auricles before and after surgery.@*Results@#40 patients were satisfied with the appearance of the auricle after the restoration. The rib cartilage obtained during the operation was consistent with the preoperative data simulation. The trauma of the operation and the operation time were reduced. There was no statistically significant difference between both auricle length and width for the reconstructed ear and those of the normal ear, auricle length mean (62.10±6.82)mm vs (60.31±6.18)mm, auricle width mean (26.10±2.26)mm vs (25.40±2.32)mm, P>0.05, respectively.@*Conclusions@#The application of digital assisted technique in congenital microtia correction could accurately display the tissue structure of the operation area, which was helpful to preoperative design, reduce intraoperative injury and achieve satisfactory surgical result .
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Objective@#To investigate the expression of long non-coding RNA(lncRNA) uc003jsd.1 in congenital microtia and its clinical significance.@*Methods@#Real-time quantitative polymerase chain reaction (Real-time PCR) was used to detect the expression of lncRNA-NR_028308 in the residual ear cartilage and normal ear cartilage of 8 patients with microtia.@*Results@#The expression of uc003jsd.1 was significantly higher in the residual ear cartilage (P=0.015) than paired normal tissues.@*Conclusions@#LncRNA-uc003jsd.1 is up-regulated in the cartilage of the congenital microtia, suggesting a certain relationship with the development of congenital microtia.
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Objective@#To discuss the safety and efficacy of simultaneous procedures of vibrant soundbridge implantation and auricular reconstruction with congenital external and middle ear malformation.@*Methods@#This is a retrospective study, including 6 patients, 5 boys and 1 girl, aged 7-12 years. All patients received simultaneous operations of vibrant soundbridge implantation and auricular reconstruction. The mean preoperative air conduction threshold was 64.8 dB HL at 0.5, 1, 2, and 4 kHz. The VSB was placed in the third stage of auricle reconstruction, if the soft tissue expansion was performed; otherwise, the VSB was implanted in the second stage. The satisfaction with reconstructed auricle, surgical complications, hearing improvement and speech discrimination scores were evaluated 6 months after surgery.@*Results@#All patients and their families reported satisfaction with their reconstructed auricle. There was no complications, including cartilage framework exposion, infection, hematoma, skin flap necrosis, facial paralysis, tinnitus, vertigo or others. Post-operatively, mean VSB-aided hearing threshold was 36.7 dB HL, which was reduced by 28.1 dB HL. The mean speech discrimination scores measured in a sound field with a presentation level of 65 dB SPL and 80 dB SPL were improved.@*Conclusions@#The simultaneous operations of auricle reconstruction and Vibrant Soundbridge implantation is an alternative method for patients with congenital microtia and atresia.
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Objective@#Bioinformatics methods were used to annotate the suspicious pathogenic genes of congenital microtia in detail, and construct the protein-protein interaction (PPI) networks to clarify the function and interaction of pathogenic genes, so as to predict the potential pathogenic genes.@*Methods@#The pathogenic genes of congenital microtia were searched using the mouse genome informatics (MGI). The results were summarized into the STRING database to construct PPI networks. The Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were carried out.@*Results@#Sixty-eight congenital microtia-related pathogenic genes such as FGF8, EYA1 and HOXA2 were searched by MGI. The PPI network contained 65 nodes and 174 edges. The average node degree was 5.35. The clustering coefficient was 0.437 and the PPI enrichment P = 0. The key node proteins were screened in PPI networks. The top ten were CTNNB1, FGF8, EGFR, BCL2, PAX6, FGF3, FGF10, WNT5A, FGFR1 and MAPK1. GO analysis and KEGG pathway analysis showed: the pathogenic genes were involved in the biological process of ear morphogenesis, ear development and embryonic organ morphogenesis. They also get involved in the molecular regulation, including sequence-specific DNA binding and regulatory region DNA binding. Expression of different genes were located in nucleus and other sub-microscopic cell components. Pathogenic genes were also involved in cancer pathway, melanoma, MAPK signaling pathways, RAS signaling pathways and other signaling pathways.@*Conclusions@#By using bioinformatics tools, we constructed the PPI networks of the congenital microtia pathogenic genes, and obtained detailed GO enrichment and KEGG pathway data. The key nodes contained the confirmed pathogenic genes of congenital microtia, which preliminarily proved the feasibility of the bioinformatics method in this study. We found some nodes were closely linked with FGF and WNT, which may be potential mutant genes of congenital microtia, although further study is needed.
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Objectives@#To explore the differences in signal pathway and gene expression related to the pathogenesis of congenital microtia by the in-depth analysis of DNA methylation profiling of auricular chondrocytes from congenital microtia patients.@*Methods@#Genome wide methylation profile of congenital microtia was obtained by MeDIP chip technology, and analyzed by Gene ontology (GO) and Pathway analysis. The gene expression levels of Wnt1 and Wnt11 were evaluated by Real-time PCR in the auricular cartilage from the healthy side and affected side of the congenital microtia patients , and healthy controls.@*Results@#The GO and Pathway assay showed that Wnt signal pathway was enriched in differential methylated levels. The Wnt1 and Wnt11 genes were with higher methylation in the promoter region and CpG islands in healthy control group than that in microtia group, in addition the methylation level in the affected side auricular cartilage was lower than that in the healthy side. There was no difference in Wnt1 and Wnt11 gene expression in microtia patients and healthy controls. The higher Wnt11 gene expression was detected in the affected side residual cartilage tissues than in the healthy side cartilage tissues of the same congenital microtia patient.@*Conclusions@#The over expression of Wnt11 during embryonic development might be associated with the pathogenesis of congenital microtia. The mechanism of the difference in methylation levles of Wnt11 affecting pathogenesis of congenital microtia needs further research.
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Formation of an ideally-shaped tragus remains one of the most challenging issues during staged tragus reconstruction in microtia patients. The authors describe a new method used to treat a unique case of concha-type microtia in which the 10-year-old male patient had only a portion of pre-existing cartilage at the tragus site. An anomalous skin lump was also present. During the initial stages of the reconstruction, the two-stage Nagata method was used for surgical correction of the microtia. An autologous rib cartilage graft was used to form the ear framework. A temporoparietal fascia flap was also constructed. Remnant skin tags and anomalous cartilage that accompany microtia are usually removed during microtia repair. However, the cartilage and skin lump were preserved during the reconstruction. The skin lump was later used to form a vascularized chondrocutaneous island flap that supplemented the portion of cartilage during tragus formation. The result was a new tragus that was satisfactorily improved in both size and shape. Patients with concha-type microtia may benefit from the use of this new method for tragus formation.
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Child , Humans , Male , Cartilage , Congenital Microtia , Ear , Ear Auricle , Fascia , Methods , Ribs , Skin , Surgical Flaps , TransplantsABSTRACT
Objective To explore the operating methods and its related questions of auricular reconstruction with totally expanded skin in combination with laser hair removal for the treatment of adolescent microtia.Methods From Jan.2013 to Dec.2016,30 adolescent microtia patients were treated with totally expanded skin.At the first stage,the 100 ml kidney-shaped expander was implanted under the skin of mastoid.After expanding capacity of 80 ml,the hair on the expanded skin was depilated once a month with reference to the healthy ear;at the second stage,after expanding capacity of 150 ml,the expander was taken out and the fiber capsule was removed;the tautologous rib cartilage was harvested and the scaffolds were sculptured;the cartilage was implanted and the expanded skin flap was used to cover the frontal surface and back surface of the scaffold;at the third stage,the earlobe transposition,conchal excavation and tragus construction were performed at the same time.Results All the patients were followed up for 3 to 24 months;the results showed 1 case of leakage of expander,4 cases of hematoma,2 case of expanded skin burst,and the complications were treated correctly,all patients were satisfied with the appearance;the color,texture,location,size;and height of ear cranial angle were matched with health ear;there was no obvious scar and auricle subunit structure was clear.Conclusions The laser in combination with the large capacity tissue expander in auricular reconstruction is simple,less trauma and less scarring.
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Preauricular sinus is a congenital malformation that is very commonly encountered among the general population and it has especially high prevalence among Asians when compared to other ethnic groups. It can often go unnoticed or easily overlooked by the patient or even by doctors because most of them are asymptomatic and is most of the time only a tiny pit that can be trivial in terms of aesthetics. We report a very rare and unique case that has no precedence what so ever; hence no reported case in the literature: an ectopic preauricular sinus in a facial cleft and microsomia patient.
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Humans , Asian People , Branchial Region , Congenital Microtia , Craniofacial Abnormalities , Esthetics , Ethnicity , PrevalenceABSTRACT
Preauricular sinus is a congenital malformation that is very commonly encountered among the general population and it has especially high prevalence among Asians when compared to other ethnic groups. It can often go unnoticed or easily overlooked by the patient or even by doctors because most of them are asymptomatic and is most of the time only a tiny pit that can be trivial in terms of aesthetics. We report a very rare and unique case that has no precedence what so ever; hence no reported case in the literature: an ectopic preauricular sinus in a facial cleft and microsomia patient.
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Humans , Asian People , Branchial Region , Congenital Microtia , Craniofacial Abnormalities , Esthetics , Ethnicity , PrevalenceABSTRACT
The complexity of the auricle makes its reconstruction technically difficult, owing to the convexities and concavities of the underlying cartilage with its tightly adherent and thin overlying skin. This article gives an overview of the current practice in the field of auricular reconstruction. The majority of surgeons who perform auricular reconstruction continues to employ the well-established techniques developed by Brent and Nagata. Surgery takes between two and four stages, with the initial stage being construction of a framework of autogenous rib cartilage which is implanted into a subcutaneous pocket. Several modifications of these techniques have been reported. Understanding the various treatment options and having sufficient practice to increase the surgeon's skills are crucial to providing the patients with the best outcomes possible.
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Humans , Cartilage , Congenital Microtia , Costal Cartilage , Ribs , Skin , SurgeonsABSTRACT
Objective To investigate the application of skin expansion ear reconstruction on congenital microtia and analysis the complications .Methods Selected 57 patients with congenital microtia in this hospital ,medpor bracket and drainage volume large drainage device were applied in 28 cases of observation group and costicartilage bracket since body and drainage volume small drain-age device were applied in 29 cases of control group .Results 57 cases achieved good therapeutic effect .Complication of narrow au-riculocephalic angular ,both sides of the pinna asymmetry in observation group had significant difference with control group (P<0 .05);The negative pressure value at 12 ,24 hours in observation group was significantly higher than in control group (P<0 .05);Drainage volume at 6 ,12 ,24 hours in observation was significantly higher than that of control group (P<0 .05) .Conclusion Skin expansion ear reconstruction on congenital microtia had high success rate ,reengineering ear has dimensional sense .The use of new materials and the large volume of drainage device can reduce complications ,and ensure the efficacy .