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Partial-thickness burns are the most common form of burns, affecting the dermis and possibly resulting in scarring and infection. The Spincare System is a new device that uses electrospinning technology to create a temporary skin-like matrix that can be applied to wounds. This study evaluated the performance, safety, and efficacy of Spincare in treating superficial to partial-thickness burns not considered for surgery. A prospective single-arm, open-label, multicenter study was conducted in 3 adult burn units across Israel. Forty-four patients with superficial to intermediate burns of up to 10% of TBSA were enrolled. Spincare was applied to the wounds, and follow-up visits were performed on days 7, 14, and 21 and months 3 and 6 posttreatment. Thirty-one patients with 36 wounds completed the day 21 visit. The mean wound healing area on day 21 was 97.26 ± 9.41%, and the mean healing time was 12.8 ± 4.3 days. Only one moderate adverse event was observed concerning the treatment, and it is important to acknowledge the potential progression of this hypertrophic scar into a keloid. This study demonstrated that Spincare is a safe and effective device for treating superficial to intermediate partial-thickness burns. Spincare achieved rapid and complete wound healing with a low incidence of adverse events.
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Queimaduras , Cicatrização , Humanos , Queimaduras/terapia , Masculino , Feminino , Adulto , Estudos Prospectivos , Pessoa de Meia-Idade , Resultado do Tratamento , Israel , Idoso , Pele Artificial , Adulto JovemRESUMO
Protein degradation, which occurs in all cells, is essential for proper cellular function by regulating many cellular processes, destroying misfolded proteins, and providing protein building blocks under starvation conditions. As proteolysis is a destructive process, it is carried out by tightly regulated enzymes that evolved to interact with their protein substrates in a highly controlled and selective manner. The agents of protein degradation include proteasomes, AAA+ proteolytic machines found in all kingdoms of life. The bacterial proteasome specifically recognizes proteins conjugated to a protein tag termed Pup, with the proteasome regulatory particle, a ring-shaped hexamer termed Mpa in mycobacteria, being responsible for Pup recognition. Once Pup binds Mpa, Pup enters the central pore, where the Mpa AAA+ domain links ATP hydrolysis to the translocation of Pup and its conjugated substrate into a barrel-shaped proteasome core particle, where peptide bond cleavage occurs. As Pup traverses the Mpa pore en route to the AAA+ domain, it passes the inter-domain. Although the inter-domain is conserved in all proteasomes, its role in substrate processing remained unclear. We report here that the Mpa inter-domain promotes Pup binding via electrostatic interactions between conserved charged inter-domain pore loops and charged Pup residues. As such, the inter-domain serves as a gatekeeper that selects for Pup binding, thus facilitating tag interaction with the downstream AAA+ domain. Our findings thus reveal the existence of an additional level of substrate binding regulation in an AAA+ protease.
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Proteínas de Bactérias , Complexo de Endopeptidases do Proteassoma , Proteólise , Proteínas de Bactérias/metabolismo , Complexo de Endopeptidases do Proteassoma/metabolismo , Ubiquitinas/metabolismo , Mycobacterium smegmatisRESUMO
Gut environments harbour dense microbial ecosystems in which plasmids are widely distributed. Plasmids facilitate the exchange of genetic material among microorganisms while enabling the transfer of a diverse array of accessory functions. However, their precise impact on microbial community composition and function remains largely unexplored. Here we identify a prevalent bacterial toxin and a plasmid-encoded resistance mechanism that mediates the interaction between Lactobacilli and Enterococci. This plasmid is widespread across ecosystems, including the rumen and human gut microbiota. Biochemical characterization of the plasmid revealed a defence mechanism against reuterin, a toxin produced by various gut microbes, such as Limosilactobacillus reuteri. Using a targeted metabolomic approach, we find reuterin to be prevalent across rumen ecosystems with impacts on microbial community structure. Enterococcus strains carrying the protective plasmid were isolated and their interactions with L. reuteri, the toxin producer, were studied in vitro. Interestingly, we found that by conferring resistance against reuterin, the plasmid mediates metabolic exchange between the defending and the attacking microbial species, resulting in a beneficial relationship or mutualism. Hence, we reveal here an ecological role for a plasmid-coded defence system in mediating a beneficial interaction.
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Limosilactobacillus reuteri , Simbiose , Humanos , Animais , Ecossistema , Plasmídeos/genética , Propano/metabolismo , Limosilactobacillus reuteri/genética , Enterococcus/genéticaRESUMO
Effective cryopreservation of large tissues, limbs, and organs has the potential to revolutionize medical post-trauma reconstruction options and organ preservation and transplantation procedures. To date, vitrification and directional freezing are the only viable methods for long-term organ or tissue preservation, but are of limited clinical relevance. This work aimed to develop a vitrification-based approach that will enable the long-term survival and functional recovery of large tissues and limbs following transplantation. The presented novel two-stage cooling process involves rapid specimen cooling to subzero temperatures, followed by gradual cooling to the vitrification solution (VS) and tissue glass transition temperature. Flap cooling and storage were only feasible at temperatures equal to or slightly lower than the VS Tg (i.e., -135°C). Vascularized rat groin flaps and below-the-knee (BTK) hind limb transplants cryopreserved using this approach exhibited long-term survival (>30 days) following transplantation to rats. BTK-limb recovery included hair regrowth, normal peripheral blood flow, and normal skin, fat, and muscle histology. Above all, BTK limbs were reinnervated, enabling rats to sense pain in the cryopreserved limb. These findings provide a strong foundation for the development of a long-term large-tissue, limb and organ preservation protocol for clinical use.
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Criopreservação , Virilha , Animais , Ratos , Criopreservação/métodos , Congelamento , Temperatura Baixa , VitrificaçãoRESUMO
Adipose tissue stromal vascular fraction (SVF) is increasingly used in the clinic. SVF separation from fat by enzymatic disruption is currently the gold standard for SVF isolation. However, enzymatic SVF isolation is time-consuming (~1.5 h), costly and significantly increases the regulatory burden of SVF isolation. Mechanical fat disruption is rapid, cheaper, and less regulatory challenging. However, its reported efficacy is insufficient for clinical use. The current study evaluated the efficacy of a novel rotating blades (RBs) mechanical SVF isolation system. Methods: SVF cells were isolated from the same lipoaspirate sample (n = 30) by enzymatic isolation, massive shaking (wash), or engine-induced RBs mechanical isolation. SVF cells were counted, characterized by flow cytometry and by their ability to form adipose-derived stromal cells (ASCs). Results: The RBs mechanical approach yielded 2 × 105 SVF nucleated cells/mL fat, inferior to enzymatic isolation (4.17 × 105) but superior to cells isolating from fat by the "wash" technique (0.67 × 105). Importantly, RBs SVF isolation yield was similar to reported yields achieved via clinical-grade enzymatic SVF isolation. RBs-isolated SVF cells were found to contain 22.7% CD45-CD31-CD34+ stem cell progenitor cells (n = 5) yielding quantities of multipotent ASCs similar to enzymatic controls. Conclusions: The RBs isolation technology provided for rapid (<15 min) isolation of high-quality SVF cells in quantities similar to those obtained by enzymatic digestion. Based on the RBs platform, a closed-system medical device for SVF extraction in a rapid, simple, safe, sterile, reproducible, and cost-effective manner was designed.
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PURPOSE: Cancer is the second leading cause of death globally. However, by implementing evidence-based prevention strategies, 30%-50% of cancers can be detected early with improved outcomes. At the integrated cancer prevention center (ICPC), we aimed to increase early detection by screening for multiple cancers during one visit. METHODS: Self-referred asymptomatic individuals, age 20-80 years, were included prospectively. Clinical, laboratory, and epidemiological data were obtained by multiple specialists, and further testing was obtained based on symptoms, family history, individual risk factors, and abnormalities identified during the visit. Follow-up recommendations and diagnoses were given as appropriate. RESULTS: Between January 1, 2006, and December 31, 2019, 8,618 men and 8,486 women, average age 47.11 ± 11.71 years, were screened. Of 259 cancers detected through the ICPC, 49 (19.8%) were stage 0, 113 (45.6%) stage I, 30 (12.1%) stage II, 25 (10.1%) stage III, and 31(12.5%) stage IV. Seventeen cancers were missed, six of which were within the scope of the ICPC. Compared with the Israeli registry, at the ICPC, less cancers were diagnosed at a metastatic stage for breast (none v 3.7%), lung (6.7% v 11.4%), colon (20.0% v 46.2%), prostate (5.6% v 10.5%), and cervical/uterine (none v 8.5%) cancers. When compared with the average stage of detection in the United States, detection was earlier for breast, lung, prostate, and female reproductive cancers. Patient satisfaction rate was 8.35 ± 1.85 (scale 1-10). CONCLUSION: We present a proof of concept study for a one-stop-shop approach to cancer screening in a multidisciplinary outpatient clinic. We successfully detected cancers at an early stage, which has the potential to reduce morbidity and mortality as well as offer substantial cost savings.[Media: see text].
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Detecção Precoce de Câncer , Neoplasias dos Genitais Femininos , Masculino , Humanos , Feminino , Estados Unidos , Adulto , Pessoa de Meia-Idade , Adulto Jovem , Idoso , Idoso de 80 Anos ou mais , Mama , Pulmão , Sistema de Registros , Programas de RastreamentoRESUMO
Background Acute facial nerve iatrogenic or traumatic injury warrants rapid management with the goal of reestablishing nerve continuity within 72 hours. However, reconstructive efforts should be performed up to 12 months from the time of injury since facial musculature may still be viable and thus facial tone and function may be salvaged. Methods Data of all patients who underwent facial nerve repair following iatrogenic or traumatic injury were retrospectively collected and assessed. Paralysis etiology, demographics, operative data, postoperative course, and outcome were examined. Results Twenty patients underwent facial nerve repair during the years 2004 to 2019. Data were available for 16 of them. Iatrogenic injury was the common category ( n = 13, 81%) with parotidectomy due to primary parotid gland malignancy being the common surgery ( n = 7, 44%). Nerve repair was most commonly performed during the first 72 hours of injury ( n = 12, 75%) and most of the patients underwent nerve graft repair ( n = 15, 94%). Outcome was available for 12 patients, all of which remained with some degree of facial paresis. Six patients suffered from complete facial paralysis (50%) and three underwent secondary facial reanimation (25%). There were no major operative or postoperative complications. Conclusion Iatrogenic and traumatic facial nerve injuries are common etiologies of acquired facial paralysis. In such cases, immediate repair should be performed. For patients presenting with facial paralysis following previous surgery or trauma, nerve repair should be considered up to at least 6 months of injury. Longstanding paralysis is best treated with standard facial reanimation procedures.
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BACKGROUND: Increasing life expectancy will likely lead greater numbers of older patients to seek postbariatric body contouring plastic surgery. The impact of age on body contouring plastic surgery outcome is undetermined. METHODS: A retrospective cohort study of 317 postbariatric body contouring plastic surgery cases was performed. Patient demographics and operative and postoperative data were collected. Patients were categorized into three age groups, and univariate analysis examined group differences. Multivariate logistic regression analysis assessed independent associations between age and surgical outcome measures. RESULTS: Patients 60 years and older had a higher mean preoperative body mass index (30.8 ± 3.6 kg/m2, p < 0.001) and higher rates of hypertension (48.9 percent, p < 0.001), dyslipidemia (38.3 percent, p < 0.001), and diabetes mellitus (17 percent, p = 0.012) compared to the younger age groups. They also sustained significantly higher complication rates (any minor complications, p = 0.004; minor surgical site infections, p = 0.005; minor hematomas, p = 0.007; any major complications, p < 0.001; major surgical-site infections, p < 0.001; and major dehiscence, p < 0.001). Increasing age was a significant risk factor for any major complications (p = 0.005), reoperation (p = 0.02), and readmission (p = 0.001). Age greater than or equal to 60 years was a significant risk factor solely for readmission (OR, 3.32; p = 0.03). CONCLUSIONS: Increasing age was a risk factor for adverse postoperative outcome in postbariatric body contouring plastic surgery patients; however, age greater than or equal to 60 years in and of itself was an independent risk factor for readmission only. These findings may aid plastic surgeons in patient consultation and in decision making regarding suitable candidates for these procedures. CLINICAL QUESTION/LEVEL OF EVIDENCE: Risk, II.
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Cirurgia Bariátrica , Contorno Corporal , Complicações Pós-Operatórias/etiologia , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Readmissão do Paciente/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Estudos Retrospectivos , Fatores de RiscoRESUMO
Dressings used to manage donor site wounds (DSWs) have up to 40% of patients experiencing complications that may cause suboptimal scarring. We evaluated the efficacy and safety of a portable electrospun nanofibrous matrix that provides contactless management of DSWs compared with standard dressing techniques. This study included adult patients who underwent an excised split-thickness skin graft (STSG) with a DSW area of 10 to 200 cm2. Patients were allocated into two groups; ie, the nanofiber group managed with a nanofibrous polymer-based matrix, and the control group managed using the standard of care such as Jelonet® or Biatain® Ibu dressing. Primary outcomes were postoperative dermal healing efficacy assessed by Draize scores. The time to complete re-epithelialization was also recorded. Secondary outcomes included postoperative adverse events, pain, and infections during the first 21 days and extended 12-month follow-up. The itching and scarring were recorded during the extended follow-up (months 1, 3, 6, 9, and 12) using Numerical-Analogue-Score and Vancouver scores, respectively. The nanofiber and control groups included 21 and 20 patients, respectively. The Draize dermal irritation scores were significantly lower in the nanofiber vs control group (Z = -2.509; P = .028) on the first postoperative day but became similar afterward (Z ≥ -1.62; P ≥ .198). In addition, the average time to re-epithelialization was similar in the nanofiber (17.9 ± 4.4 days) and control group (18.3 ± 4.5 days; Z = -0.299; P = .764), so were postoperative adverse events, pain, and infection incidence, itching and scarring. The safety and efficacy of electrospun nanofibrous matrix are similar to standard wound care allowing its use as an alternative donor site dressing following the STSG excision.
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Queimaduras , Nanofibras , Adulto , Queimaduras/cirurgia , Cicatriz/etiologia , Humanos , Nanofibras/uso terapêutico , Dor/etiologia , Polímeros , Estudos Prospectivos , Prurido/etiologia , Transplante de Pele/métodos , Sítio Doador de Transplante/cirurgia , CicatrizaçãoRESUMO
In an event reminiscent of eukaryotic ubiquitination, the bacterial prokaryotic ubiquitin-like protein (Pup)-proteasome system (PPS) marks target proteins for proteasomal degradation by covalently attaching Pup, the bacterial tagging molecule. Yet, ubiquitin is released from its conjugated target following proteasome binding, whereas Pup enters the proteasome and remains conjugated to the target. Here, we report that although Pup can be degraded by the bacterial proteasome, it lacks favorable 20S core particle (CP) cleavage sites and is thus a very poor 20S CP substrate. Reconstituting the PPS in vitro, we demonstrate that during pupylated protein degradation, Pup can escape unharmed and remain conjugated to a target-derived degradation fragment. Removal of this degradation fragment by Dop, a depupylase, facilitates Pup recycling and re-conjugation to a new target. This study thus offers a mechanistic model for Pup recycling and demonstrates how a lack of protein susceptibility to proteasome-mediated cleavage can play a mechanistic role in a biological system.
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Células Procarióticas/metabolismo , Complexo de Endopeptidases do Proteassoma/metabolismo , Proteólise , Ubiquitinas/metabolismo , Mycobacterium/metabolismoRESUMO
This report introduces the concept of large-scale surgery and reconstruction when all other medical means of treatment have failed. In select cases, this may act as a mode of buying time and allowing the patient to receive second- or third-line treatments.
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The understanding of how proteins evolve to perform novel functions has long been sought by biologists. In this regard, two homologous bacterial enzymes, PafA and Dop, pose an insightful case study, as both rely on similar mechanistic properties, yet catalyze different reactions. PafA conjugates a small protein tag to target proteins, whereas Dop removes the tag by hydrolysis. Given that both enzymes present a similar fold and high sequence similarity, we sought to identify the differences in the amino acid sequence and folding responsible for each distinct activity. We tackled this question using analysis of sequence-function relationships, and identified a set of uniquely conserved residues in each enzyme. Reciprocal mutagenesis of the hydrolase, Dop, completely abolished the native activity, at the same time yielding a catalytically active ligase. Based on the available Dop and PafA crystal structures, this change of activity required a conformational change of a critical loop at the vicinity of the active site. We identified the conserved positions essential for stabilization of the alternative loop conformation, and tracked alternative mutational pathways that lead to a change in activity. Remarkably, all these pathways were combined in the evolution of PafA and Dop, despite their redundant effect on activity. Overall, we identified the residues and structural elements in PafA and Dop responsible for their activity differences. This analysis delineated, in molecular terms, the changes required for the emergence of a new catalytic function from a preexisting one.
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Evolução Molecular , Hidrolases/genética , Ligases/genética , Mycobacterium smegmatis/enzimologia , Sequência de Aminoácidos , Proteínas de Bactérias/química , Proteínas de Bactérias/genética , Escherichia coli , Hidrolases/química , Ligases/química , Conformação ProteicaRESUMO
BACKGROUND: Implant-based breast reconstruction is commonly avoided in the setting of radiation therapy, mainly because of risks of capsular contracture. Nevertheless, as breast reconstruction is becoming more available, more patients undergo both implant-based breast reconstruction and radiotherapy. The dilemma is how to manage capsular contracture if it does occur. The goal of this study was to examine the outcome of patients with implant-based breast reconstruction who developed postirradiation capsular contracture and were treated with capsulotomy or capsulectomy, with or without fat grafting. METHODS: The authors reviewed charts of patients who developed capsular contracture following alloplastic breast reconstruction followed by radiation therapy, between 2008 and 2018. The surgical treatment methods for capsular contracture were evaluated along with their outcomes. A follow-up of at least 1 year was required. RESULTS: Forty-eight breasts with postirradiation capsular contracture underwent surgical implant exchange with capsular release, of which 15 had combined fat grafting and 33 did not. Overall, 35 breasts (72.9 percent) showed long-term resolution of capsular contracture; 24 underwent a single procedure and 11 required an additional fat grafting procedure. Some patients [six breasts (12.5 percent)] were offered a consecutive round of fat grafting, and some [seven breasts (14.5 percent)] were offered autologous reconstruction because of lack of improvement. Fat grafting increased the success rate by more than 30 percent when it was initially and consecutively used. CONCLUSIONS: Postirradiation capsular contracture may be treated successfully by secondary procedures, sustaining implant-based breast reconstruction in over 70 percent of breasts. Fat grafting may elevate resolution rates even further, to 86 percent. Larger prospective studies are required to validate these findings. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.
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Implante Mamário/efeitos adversos , Implantes de Mama/efeitos adversos , Neoplasias da Mama/terapia , Contratura Capsular em Implantes/terapia , Derme Acelular/estatística & dados numéricos , Tecido Adiposo/transplante , Mama/efeitos da radiação , Mama/cirurgia , Implante Mamário/instrumentação , Quimiorradioterapia Adjuvante/efeitos adversos , Remoção de Dispositivo/estatística & dados numéricos , Feminino , Seguimentos , Humanos , Contratura Capsular em Implantes/etiologia , Mastectomia/efeitos adversos , Reoperação/estatística & dados numéricos , Estudos Retrospectivos , Retalhos Cirúrgicos/estatística & dados numéricos , Retalhos Cirúrgicos/transplante , Tempo para o Tratamento , Transplante Autólogo/estatística & dados numéricos , Resultado do TratamentoRESUMO
BACKGROUND: The free fibula flap is commonly referred to as a "workhorse" for head and neck reconstruction. During our 21-year experience with this flap, we have performed several changes in preoperative planning, operative technique, and postoperative follow-up. PATIENTS AND METHODS: A retrospective cohort study designed to analyze the cohort of patients who underwent free fibula transfer for head and neck reconstruction. Demographics, medical background, operative data, and postoperative outcome were collected. The changes we performed in preoperative planning, operative technique, and postoperative follow-up were assessed and their impact on outcome discussed. RESULTS: During 1998 to 2019 a total of 128 free fibula flaps were transferred for head and neck reconstruction. When comparing the patients treated in the early years to those who were treated in recent years we found no statistically significant difference in minor or major nonmicrosurgical complications in the recipient and donor site and in the rate of take backs due to microsurgical reasons. However total flap failure rate improved from 28% in early years to 8% in recent years (p = 0.012). CONCLUSION: During this 21-year period, we performed several changes in our practice. This included the use of a three-dimensional (3D) prefabricated model of the mandible, a shift toward side-table osteotomies, increasing the rate of osteofascial flaps in contrast to osteocutaneous flaps and the use of an implantable Doppler. These changes, together with a learning curve of the surgical team, significantly improved our overall success rates.
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Retalhos de Tecido Biológico , Neoplasias de Cabeça e Pescoço , Procedimentos de Cirurgia Plástica , Fíbula , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Mandíbula/cirurgia , Complicações Pós-Operatórias , Estudos RetrospectivosRESUMO
BACKGROUND: Reduction mammoplasty in patients with gigantic breast hypertrophy runs a high risk of complication. Traditionally, inferior pedicle reductions or free nipple grafting techniques have been recommended for gigantic breasts on the basis of measurements and expected resection weights. The superiomedial pedicle (SMP) technique has been less commonly used, due to concerns of vascular inadequacy. This study examines the outcomes of SMP in large reductions and outlines suggested modifications for enhanced safety. METHODS: This is a retrospective review of all patients who underwent SMP breast reduction in our institution between 2005 and 2016. Included are cases with resection weights greater than 800 g. RESULTS: A total of 173 patients with 341 breasts were included. Mean sternal notch to nipple (SNN) distance was mean 35.0 ± 6.6 cm (range 23-44.5) on the left and 34.9 ± 6.6 cm (range 18-46) on the right. Mean resection weight was 1152.2 ± 368.6 g (range 810-2926) on the left and 1159.4 ± 326.6 g (range 800-2528) on the right. The total complication rate was 22.7%. Minor complications occurred in 63 (18.6%) breasts. Major complications occurred in 12 (4.1%) breasts. NAC congestion and partial necrosis occurred in 1.8% and total NAC necrosis in 0.9%. CONCLUSION: The SMP reduction technique is a safe option for gigantic breast reduction with comparable complication rates to other techniques. Preoperative measurements or resection weights are not reliable risk factors alone. High tissue density may be a significant risk factor. High-risk breasts mandate surgical planning and should be tailored to include technical modifications as described. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.
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Mamoplastia , Retalhos Cirúrgicos , Estudos de Coortes , Estética , Humanos , Hipertrofia/cirurgia , Mamilos/cirurgia , Estudos Retrospectivos , Medição de Risco , Resultado do TratamentoRESUMO
OBJECTIVES: Reconstruction of surgical defects by free tissue transfer following resection of head and neck tumors in children are sparse. This study aims to assess the feasibility and safety of free flap reconstruction following surgical ablation of head and neck and skull base tumors in children based on our experience and the recent literature. METHODS: Data from medical files of all children and adolescents <18 years of age who underwent free flap reconstruction following resection of head and neck and skull base tumors at our tertiary center between 2000 and 2018 were retrospectively reviewed. Data on early and late complications at the primary and donor sites, functional and aesthetic outcome, and tumor control were analyzed. RESULTS: Twenty-four children (mean age 11.3 ± 5.1 years) were enrolled. Early complications occurred in 14 (56%) and late complications occurred in 8 (32%) of the procedures, with surgical intervention required in 4 (16%). Prior chemoradiation, sarcoma, non-reanimation procedures, and the use of rectus abdominis free flaps were associated with higher complication rates. The final functional and cosmetic outcomes, including mastication, deglutition, and speech, were satisfactory in all patients with one exception. CONCLUSIONS: Free flap transfer is a safe and feasible technique for reconstructing head and neck and skull base defects following surgical excision of tumors in children. Early identification and precautionary measures against the effects of potential causes of complications may improve outcome. Larger international cohort studies are warranted.
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Retalhos de Tecido Biológico , Neoplasias de Cabeça e Pescoço , Procedimentos de Cirurgia Plástica , Base do Crânio/cirurgia , Adolescente , Criança , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Estudos Retrospectivos , Resultado do TratamentoRESUMO
INTRODUCTION: Paralysis of the facial mimetic muscles causes loss of voluntary and non-voluntary muscle function, as well as facial tone. This is a devastating condition with profound functional, aesthetic and psychological consequences. Etiologies include congenital paralysis and acquired paralysis following viral infection, trauma, head and neck tumors, iatrogenic damage and more. Clinical presentation includes ocular symptoms (dry eye, epiphora, corneal irritation), nasal symptoms (nasal obstruction) and oral symptoms (drooling and speech disturbances). Reconstruction of facial nerve function is based on renewing the neural input to the paralyzed face in parallel with transferring a functioning muscle. The gold standard in long term facial paralysis reanimation includes a two-stage procedure that involves cross-face nerve grafting and later on a free gracilis muscle transfer. This method allows reconstruction of a symmetric, spontaneous and voluntary smile. In cases when cross-face nerve grafting is impossible, a free-gracilis muscle transfer is performed with neural coaptation to another cranial nerve, most commonly the motor nerve to the masseter muscle (of the trigeminal nerve). Non-microsurgical methods for facial reanimation exist, however, nowadays they are rarely performed. In addition to the surgical reconstruction, other surgical and non-surgical procedures are performed for functional and aesthetic symmetrization purposes. These include fat injection to the face, botulinum toxin injection, oculoplastic procedures and more. In this article we describe our patient population with facial nerve paralysis, common facial reanimation procedures, considerations in choosing the appropriate reconstruction procedure and the general approach for treatment of facial paralysis in our multidisciplinary facial paralysis clinic.
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Nervo Facial , Paralisia Facial , Procedimentos de Cirurgia Plástica , Músculos Faciais , Humanos , SorrisoAssuntos
Infecções por Coronavirus , Pandemias , Pneumonia Viral , Cirurgiões , Cirurgia Plástica , Betacoronavirus , COVID-19 , Política de Saúde , Humanos , SARS-CoV-2 , Triagem , Estados UnidosRESUMO
Hemifacial myohyperplasia (HMH) is a rare congenital disorder characterized by the unilateral enlargement of facial muscles and unilateral hypoplasia of the skeletal structures. The causes, risk of recurrence in subsequent offspring, and pathogenesis of HMH remain unclear, and the condition can involve a number of features. Among them are pronounced facial asymmetry and changes to both hard and soft tissue structures, as well as facial hemiparesis. We describe the long-term surgical management of HMH in a 3-year-old girl who presented to our department with no other systemic manifestation. We describe the treatment options as well as our approach, which included the use of botulinum toxin injections, and our considerations when choosing to employ careful preservation of the facial nerve and facial mimetic muscles (rather than facial paralysis and facial reanimation) in 2 stages using muscle and nerve grafts. We found that sequential debulking procedures undertaken at significant intervals have offered our patient improved aesthetic and functional results in comparison with the use of nonsurgical techniques, comparable to the more complex grafting technique used in facial reanimation surgery. Due, in part, to the rarity of HMH, there is currently no consensus regarding the optimal treatment approach to the condition. Our use of serial debulking rather than the more complex and problematic microsurgical approach of facial reanimation surgery offers a feasible surgical solution with both aesthetic and functional improvement for these patients.