ABSTRACT
Introducción. Las lesiones del nervio facial afectan la plasticidad a largo plazo en el hipocampo, así como la memoria de reconocimiento de objetos y la memoria espacial, dos procesos dependientes de esta estructura. Si bien se ha descrito una activación de la microglía en la corteza motora primaria asociada con esta lesión, no se conoce si ocurre algo similar en el hipocampo. Objetivo. Caracterizar en ratas el efecto de la lesión unilateral del nervio facial sobre la activación de células de la microglía en el hipocampo contralateral. Materiales y métodos. Se hicieron experimentos de inmunohistoquímica para detectar células de la microglía en el hipocampo de ratas sometidas a lesión irreversible del nervio facial. Los animales se sacrificaron en distintos momentos después de la lesión, para evaluar la evolución de la proliferación (densidad de células) y la activación (área celular) de la microglía en el tejido del hipocampo. Los tejidos cerebrales de los animales de control se compararon con los de animales lesionados sacrificados en los días 1,3, 7, 21 y 35 después de la lesión. Resultados. Las células de la microglía en el hipocampo de animales con lesión del nervio facial mostraron signos de proliferación y activación a los 3, 7 y 21 días después de la lesión. Sin embargo, al cabo de cinco semanas, estas modificaciones se revirtieron, a pesar de que no hubo recuperación funcional de la parálisis facial. Conclusiones. La lesión irreversible del nervio facial produce proliferación y activación temprana y transitoria de las células de la microglía en el hipocampo. Estos cambios podrían estar asociados con las modificaciones electrofisiológicas y las alteraciones comportamentales dependientes del hipocampo descritas recientemente.
Introduction: Facial nerve injury induces changes in hippocampal long-term synaptic plasticity and affects both object recognition memory and spatial memory consolidation (i.e., hippocampus-dependent tasks). Although facial nerve injury-associated microglíal activation has been described regarding the primary motor cortex, it has not been ascertained whether something similar occurs in the hippocampus. Peripheral nerve injury- associated microglíal changes in hippocampal tissue could explain neuronal changes in the contralateral hippocampus. Objective: To characterize the effect of unilateral facial nerve injury on microglíal proliferation and activation in the contralateral hippocampus. Materials and methods: Immunohistochemical experiments detected microglíal cells in the hippocampal tissue of rats that had undergone facial nerve injury. The animals were sacrificed at specific times after injury to evaluate hippocampal microglíal cell proliferation (cell density) and activation (cell area); sham-operated animals were compared to lesioned animals sacrificed 1,3, 7, 21, or 35 days after injury. Results: Facial nerve-injured rats' hippocampal microglíal cells proliferated and adopted an activated phenotype 3- to 21-days post-lesion. Such modifications were transient since the microglíal cells returned to their resting state five weeks after injury, despite the injury's irreversible nature. Conclusions: Facial nerve injury causes the transient proliferation and activation of microglíal cells in the hippocampus. This finding might partly explain the morphological and electrophysiological changes described for CA1 pyramidal neurons and the impairment of spatial memory consolidation which has previously been observed in facial nerve-injured rats.
Subject(s)
Facial Nerve , Hippocampus , Rats , ImmunohistochemistryABSTRACT
Purpose: To describe the microsurgical anatomical aspects of the extratemporal facial nerve of Wistar rats under a high-definition video system. Methods: Ten male Wistar rats (1215 weeks old), without veterinary diseases, weighing 220280 g, were used in this study. All animals in this study were submitted to the same protocol and by the same surgeon. A 10-mm incision was made below the bony prominence of the right or left ear, and extended towards the angle of the mandible. The dissection was performed and the main branches of the facial nerve were dissected. Results: The main trunk of the facial nerve has a length of 0.88 ± 0.10 mm and a length of 3.81 ± 1.03 mm, measured from its emergence from the stylomastoid foramen to its bifurcation. Seven branches originating from the facial nerve were identified: posterior auricular, posterior cervical, cervical, mandibular, buccal, temporal, and zygomatic. Conclusions: The anatomy of the facial nerve is comparable to that of humans, with some variations. The most observed anatomical division was the distribution in posterior auricular, posterior cervical, cervical, mandibular, buccal, temporal, and zygomatic branches. There is no statistical difference between the thickness and distance of the structures compared to the contralateral side.
Subject(s)
Animals , Male , Rats , Microdissection/veterinary , Facial Nerve/anatomy & histology , Facial Paralysis/surgery , Microsurgery/veterinary , Video-Assisted Surgery/veterinaryABSTRACT
Intoduction The pathways of the facial nerve are variable, and knowledge of that is essential. The worst impact caused by facial paralysis is related to quality of life, especially regarding the self-esteem and social acceptance on the part of the patients, leading to social isolation and disruption on their mental health. Case Report A 33-year-old female patient, with a stage-T3 acoustic neurinoma, presented with a moderate dysfunction (grades II to III) according to the House- Brackmann (HB) Facial Nerve Grading System. A 43-year-old male patient, with a stage- T4B trigeminal schwannoma, underwent a resective surgery and presented grade-VI dysfunction according to the HB scale. And a female patient with a stage-T4A acoustic neurinoma presented grade-IV dysfunction according to the HB scale. Discussion We performed a literature review of papers related to surgeries for masseteric-facial nerve anastomosis and compiled the results in table; then, we compared these data with those obtained from our cases. Conclusion The masseteric nerve is the one that shows the best prognosis among all the cranial nerves that could be used, but it is also necessary to perform well the surgical technique to access the facial branch and consequently achieve a better masseteric-facial nerve anastomosis.
Subject(s)
Humans , Male , Female , Adult , Anastomosis, Surgical/methods , Facial Nerve/surgery , Hypoglossal Nerve/surgery , Mandibular Nerve/surgery , Prognosis , Nerve Transfer/rehabilitation , Facial Paralysis/complications , Facial Paralysis/rehabilitationABSTRACT
Introduction The side-to-end hypoglossal-facial anastomosis (HFA) technique is an excellent alternative technique to the classic end-terminal anastomosis, because itmay decrease the symptoms resulting from hypoglossal-nerve transection. Methods Patients with facial nerve palsy (House-Brackmann [HB] grade VI) requiring facial reconstruction from 2014 to 2017were retrospectively included in the study. Results In total, 12 cases were identified, with a mean follow-up of 3 years. The causes of facial paralysis were due to resection of posterior-fossa tumors and trauma. There was improvement in 91.6% of the patients (11/12) after the HFA. The rate of improvement according to the HB grade was as follows: HB III - 58.3%; HB IV - 16.6%; and HB II - 16.6%. The first signs of improvement were observed in the patients with the shortest time between the paralysis and the anastomosis surgery (3.5months versus 8.5 months; p » 0.011). The patients with HB II and III had a shorter time between the diagnosis and the anastomosis surgery (mean: 5.22 months), while the patients with HB IV and VI had a longer time of paresis (mean: 9.5 months; p » 0.099). We did not observe lingual atrophy or changes in swallowing. Discussion and Conclusion Hypoglossal-facial anastomosis with the terminolateral technique has good results and low morbidity in relation to tongue motility and swallowing problems. The HB grade and recovery appear to be better in patients operated on with a shorter paralysis time.
Subject(s)
Anastomosis, Surgical/methods , Anastomosis, Surgical/rehabilitation , Facial Nerve/surgery , Facial Paralysis/rehabilitation , Hypoglossal Nerve/surgery , Medical Records , Data Interpretation, Statistical , Treatment Outcome , Statistics, Nonparametric , Plastic Surgery Procedures/rehabilitation , Recovery of Function , Facial Paralysis/surgery , Facial Paralysis/etiologySubject(s)
Humans , Chagas Disease/complications , Facial Paralysis/etiology , Acute Disease , Facial NerveABSTRACT
INTRODUCCIÓN. La parálisis facial refractaria produce ectropión paralítico secundario, que predispone a la queratopatía por exposición y otras complicaciones oculares, que deben ser manejadas con cirugía. OBJETIVO. Describir el manejo quirúrgico oftalmoló-gico en parálisis facial refractaria mediante tira tarsal y suspensión del pliegue nasolabial. MATERIALES Y MÉTODOS. Estudio observacional, retrospectivo. Población y muestra conocida de 8 Historias Clínicas, en el Hospital de Especialidades Carlos Andrade Marín, período enero 2016 a diciembre 2018. Criterios de inclusión: registros de parálisis facial y ectropión paralítico. Los datos fueron tomados del sistema AS400, y se analizaron en el programa estadístico International Business Machines Statistical Package for the Social Sciences, Versión 25.0. RESULTADOS. La etiología tumoral fue 62,5% (5; 8), A los 6 me-ses postquirúrgicos se observó resolución de: lagoftalmos, lagrimeo, ardor ocular y quera-titis en el 87,5% (7; 8); el ectropión se resolvió en todos los casos y se obtuvo una mejoría en la ptosis. La agudeza visual mejoró en el 75,0% (6; 8). DISCUSIÓN: La literatura evi-denció que las técnicas quirúrgicas si bien no abordan el aspecto oftalmológico y estético a la vez, aún es incierto su manejo de manera conjunta dado que ha sido poco descrita pero ha adquirido importancia por los resultados en la Unidad de Oftalmología del hospital.CONCLUSIÓN. La descripción del manejo quirúrgico oftalmológico en parálisis facial re-fractaria mediante la técnica de tira tarsal y suspensión del pliegue nasolabial fue asertiva como experiencia local.
INTRODUCTION. Refractory facial paralysis produces secondary paralytic ectropion, which predisposes to exposure keratopathy and other ocular complications, which must be managed with surgery. OBJECTIVE. Describe the ophthalmic surgical management of refractory facial paralysis using tarsal strip and suspension of the nasolabial fold. MATE-RIALS AND METHODS. Observational, retrospective study. Population and known sam-ple of 8 Clinical Histories, at the Carlos Andrade Marín Specialty Hospital, period from january 2016 to december 2018. Inclusion criteria: records of facial paralysis and paralytic ectropion. The data were taken from the AS400 system, and analyzed in the statistical pro-gram International Business Machines Statistical Package for the Social Sciences, Version 25.0. RESULTS. The tumor aetiology was 62,5% (5; 8). At 6 months after surgery, resolu-tion of: lagophthalmos, lacrimation, ocular burning and keratitis was observed in 87,5% (7; 8); ectropion resolved in all cases and ptosis improved. Visual acuity improved in 75,0% (6; 8). DISCUSSION: The literature showed that the surgical techniques, although they do not address the ophthalmological and aesthetic aspects at the same time, their joint mana-gement is still uncertain since it has been little described but has acquired importance due to the results in the Ophthalmology Unit of the hospital. CONCLUSION. The description of ophthalmic surgical management in refractory facial paralysis using the tarsal strip techni-que and suspension of the nasolabial fold was assertive as a local experience.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Blepharoptosis , Ectropion , Facial Nerve , Facial Paralysis , Nasolabial Fold , Keratitis , Ophthalmology , Ophthalmologic Surgical Procedures , Visual AcuityABSTRACT
Abstract Introduction: Olfactory ensheathing cell is a unique kind of glia cells, which can promote axon growth. Little is known about the differences between olfactory mucosa olfactory ensheathing cells and olfactory bulb olfactory ensheathing cells in the capability to promote nerve regeneration. Objective: To study the recovery of the rat facial nerve after olfactory ensheathing cells transplantation, and to compare the differences between the facial nerve regeneration of olfactory mucosa-olfactory ensheathing cells and olfactory bulb olfactory bulb olfactory ensheathing cells transplantation. Methods: Institutional ethical guideline was followed (201510129A). Olfactory mucosa-olfactory ensheathing cells and olfactory bulb olfactory ensheathing cells were cultured and harvested after 7 days in vitro. 36 Sprague Dawley male rats were randomly divided into three different groups depending on the transplanting cells: Group A: olfactory mucosa-olfactory ensheathing cells; Group B: olfactory bulb olfactory ensheathing cells; Group C: DF-12 medium/fetal bovine serum. The main trunk of the facial nerve was transected and both stumps were inserted into a polylactic acid/chitosan conduit, then the transplanted cells were injected into the collagen in the conduits. After 4 and 8 weeks after the transplant, the rats of the three groups were scarified and the facial function score, facial nerve evoked potentials, histology analysis, and fluorescent retrograde tracing were tested and recorded, respectively, to evaluate the facial nerve regeneration and to analysis the differences among the three groups. Results: Olfactory ensheathing cells can promote the facial nerve regeneration. Compared with olfactory bulb olfactory ensheathing cells, olfactory mucosa olfactory ensheathing cells were more effective in promoting facial nerve regeneration, and this difference was more significant 8 weeks after the transplantation than 4 weeks. Conclusion: We discovered that olfactory ensheathing cells with nerve conduit could improve the facial nerve recovery, and the olfactory mucosa olfactory ensheathing cells are more effective for facial nerve regeneration compared with olfactory bulb olfactory ensheathing cells 8 weeks after the transplantation. These results could cast new light in the therapy of facial nerve defect, and furnish the foundation of auto-transplantation of olfactory mucosa olfactory ensheathing cells in periphery nerve injury.
Resumo Introdução: A célula embainhante olfatória é um tipo especial de célula glial que pode promover o crescimento do axônio. Pouco se sabe sobre as diferenças entre as células embainhantes olfatórias da mucosa olfatória e as células embainhantes olfatórias do bulbo olfatório em relação à sua capacidade de promover a regeneração nervosa. Objetivo: Estudar a regeneração do nervo facial de ratos após o transplante de células embainhantes olfatórias e comparar as diferenças entre a regeneração do nervo facial com o transplante de células embainhantes olfatórias da mucosa olfatória e de células embainhantes olfatórias do bulbo olfatório. Método: As recomendações éticas da instituição (201510129A) foram seguidas. Células embainhantes olfatórias da mucosa olfatória e células embainhantes olfatórias do bulbo olfatório foram cultivadas in vitro e coletadas após sete dias. Trinta e seis ratos Sprague Dawley machos foram divididos aleatoriamente em três grupos, dependeu das células transplantadas: Grupo A, células embainhantes olfatórias da mucosa olfatória; Grupo B, células embainhantes olfatórias do bulbo olfatório; Grupo C, meio de DF-12/soro fetal bovino. O tronco principal do nervo facial foi seccionado e ambos os cotos foram inseridos em um conduto de ácido polilático/quitosana; em seguida, as células transplantadas foram injetadas em colágeno nos condutos. Após quatro e oito semanas do transplante, os ratos dos três grupos foram agitados para a obtenção do escore da função facial, potenciais evocados do nervo facial, análise histológica e marcador fluorescente retrógrado, que foram testados e registrados, respectivamente, para avaliar a regeneração do nervo facial e analisar as diferenças entre os três grupos. Resultados: Células embainhantes olfatórias podem promover a regeneração do nervo facial. Em comparação com as células embainhantes olfatórias do bulbo olfatório, as células embainhantes olfatórias da mucosa olfatória foram mais eficazes na promoção da regeneração do nervo facial e essa diferença foi mais significativa oito semanas após o transplante em comparação com quatro semanas. Conclusão: Verificamos que células embainhantes olfatórias com conduto nervoso podem melhorar a recuperação do nervo facial e as células embainhantes olfatórias da mucosa olfatória são mais eficazes para a regeneração do nervo facial em comparação com as células embainhantes olfatórias do bulbo olfatório oito semanas após o transplante. Esses resultados podem lançar uma nova luz no tratamento de defeitos do nervo facial e fornecer a base do autotransplante de células embainhantes olfatórias da mucosa olfatória em lesões do nervo periférico.
Subject(s)
Animals , Male , Rats , Facial Nerve , Nerve Regeneration , Olfactory Bulb , Olfactory Mucosa , Rats, Sprague-DawleyABSTRACT
A Paralisia Facial Periférica (PFP) é resultante da disfunção do nervo facial. A incapacidade de mover o rosto tem consequências sociais e funcionais para o paciente. OBJETIVO: Analisar a relação entre comprometimento motor facial e bem estar em pacientes com PFP. MÉTODO: Trata-se de uma pesquisa de caráter descritivo, observacional, do tipo transversal. Os critérios de elegibilidade consistiam em ter diagnóstico de paralisia facial e estar sendo atendido namclínica escola de Fisioterapia da FACISA. A amostra foi constituída porm20 pessoas com PFP. Os pacientes foram avaliados por uma ficha de avaliação sociodemográfica e pelos instrumentos: Escala de HouseBrackmann (HB) e o Índice de Incapacidade Facial (IIF).Utilizou-se o coeficiente de correlação de Spearman para analisar o grau de correlação entre HB, IF e o tempo de lesão. RESULTADOS: Os participantes foram 65% do sexo feminino, a mediana da idade foi de 50,5 anos, o tempo de lesão foi de 3 a 331 dias (mediana 17,5 dias), a etiologia predominante foi idiopática 65%, e ambas hemifaces foram acometidas em igual proporção (50%). Quanto as características clínicas da PFP, o nível de comprometimento motor facial graduado pela escala de HB obteve mediana 4, o IFF-física obteve mediana 60. IFF-função social obteve mediana 38. Nas correlações entre HB, tempo de lesão e IFF, foi observado que os valores obtidos indicaram que não houve correlações estatisticamente significantes. CONCLUSÃO: Mesmo que o nível de comprometimento motor facial esteja acentuado, não houve correlação com o bem-estar dos participantes.
Peripheral Facial Paralysis (PFP) is the result of facial nerve dysfunction. The inability to move the face has social and functional consequences for the patient. OBJECTIVE: To analyze the relationship between facial motor impairment and wellbeing in patients with Peripheral Facial Paralysis (PFP). METHOD: This is a descriptive, observational, cross-sectional study. The eligibility criteria consisted of having a diagnosis of facial paralysis and being seen at the FACISA School of Physiotherapy clinic. The sample consisted of 20 people affected by PFP. The patients were evaluated by a socio-demographic data sheet and by the instruments: House-Brackmann Scale (HB) and Facial Impairment Index (IIF). Spearman's correlation coefficient was used to analyze the degree of correlation between HB, IF and injury time. RESULTS: The participants were 65% female, the median age was 50.5 years, the injury time was 3 to 331 days (median 17.5 days), the predominant etiology was idiopathic 65%, and both hemifaces were affected in equal proportion (50%). As for the clinical characteristics of PFP, the level of facial motor impairment graded by the HB scale obtained a median of 4, the IFF-physics obtained a median of 60. IFFsocial function obtained a median of 38. In the correlations between HB, injury time and IFF, it was observed that the values obtained indicated that there were no statistically significant correlations. CONCLUSION: Even though the level of facial motor impairment is marked, there was no correlation with the participants' well-being.
Subject(s)
Facial Paralysis , Facial NerveABSTRACT
Introdução: A cirurgia de Bichectomia está sendo muito procurada por pessoas que visam diminuir o volume facial. O corpo adiposo da bochecha, ou bola de Bichat, possui uma complexa relação anatômica com estruturas faciais. Uma das complicações que o procedimento pode causar é a paralisia facial temporária ou permanente, em decorrência de injúrias causadas aos ramos terminais do nervo facial, devido à proximidade dessas duas estruturas anatômicas. Metodologia: O objetivo do presente artigo é enfatizar a relação anatômica da bola de Bichat com alguns ramos terminais do nervo facial através da dissecação de cadáveres. Foram feitas dissecações em três hemifaces de cadáveres humanos para a exposição do corpo adiposo da bochecha e dos ramos extracranianos do nervo facial. Resultados: A anatomia dos ramos terminais zigomáticos e bucais do nervo facial se mostrou variável em cada hemiface dissecada, mas sempre intimamente relacionados a bola de Bichat. Conclusões: O profissional que realiza a Bichectomia deve ter pleno conhecimento não só da técnica cirúrgica, mas também da variabilidade anatômica da região... (AU)
Introduction: The Buccal Fat Extraction surgery has been sought by people who aim to reduce facial volume. The Buccal fat pad has a complex anatomical correlation among the facial structures. The facial nerve paralysis is one of Bichat's fat extraction complications which might be temporary or permanent, due to the proximity of those anatomical structures. Methodology: The present article aims to emphasize the anatomical correlation between the Buccal fat pad and a few terminal branches of the facial nerve through the human cadaveric dissection. The dissection was performed on three human cadaveric hemifacial to expose the buccal fat pad body and the facial nerve extracranial branches. Results: The zygomatic and buccal terminal branches anatomy of the facial nerve has shown variables in each dissected hemifacial part. However, it has always presented closely related to Bichat's fat pad. Conclusions: The professional that performs the Buccal Fat Removal surgery must have to have the full knowledge not only about the surgical technique but the anatomical variability of the region, as well... (AU)
Subject(s)
Humans , Surgery, Oral , Cheek/anatomy & histology , Cheek/innervation , Adipose Tissue/innervation , Facial Nerve/anatomy & histology , Cadaver , DissectionABSTRACT
Resumen: El síndrome de Melkersson-Rosenthal (SMR) es una entidad clínica rara, de patogénesis desconocida. Se manifiesta característicamente por edema orofacial recidivante, lengua fisurada y parálisis recurrente del nervio facial. Representando así undesafío diagnóstico y terapéutico, además de generar importante compromiso social al individuo acometido. El presente artículo tiene como objetivo describir el caso de un paciente de 15años de edad que presentó: edema labial, lengua fisurada y queilitis granulomatosa al examen histopatológico, llevándose a consideración la hipótesis del síndrome citado, con resultados satisfactorios al tratamiento establecido.
Abstract: Melkersson-Rosenthal syndrome (MRS) is a rare clinical entity with an unknown pathogenesis. It clinically manifests in orofacial edema, plicated tongue and recurrent paralysis of the facial nerve. It represents a diagnostic and therapeutic challenge, and has an important psycosocial impact on the affected individual. This study describes the case of a 15-year-old patient who presented with labial edema, plicated tongue and granulomatous cheilitis on histopathological examination, for which a diagnosis of MRS was proposed. The patient showed a good response to treatment.
Subject(s)
Humans , Male , Adolescent , Tongue, Fissured/etiology , Edema/etiology , Facial Nerve/physiopathology , Melkersson-Rosenthal Syndrome/physiopathology , Paralysis/etiology , Melkersson-Rosenthal Syndrome/diagnosisABSTRACT
Se presenta una breve revisión los nervios olfatorio, trigémino, facial, glosofaríngeo y vago, el primero funcionalmente relacionado con la inervación quimiosensitiva olfativa en la mucosa nasal, los siguientes para el registro de dolor endocraneal y para la mucosa orofaríngea, a efectos de transducción sensitiva gustativa. Estos nervios se vinculan con los síntomas en pacientes positivos para Covid-19, que manifiestan como dolor de cabeza, disosmia, anosmia, disgeusia, ageusia entre otras características neurosemiológicas. Se concluye que estas características semiológicas se puedan deber a mecanismos neurotrópicos y transinápticos por lo que se debe realizar un examen neurológico más riguroso sobre síntomas y signos de pacientes con Covid-19.
A brief review of olfactory, facial, glossopharyngeal and vagus nerves is presented, the first one functionally related to odoriferous chemosensory innervation in the nasal mucosa, the following four cranial nerves to endocranial headache and oropharyngeal mucosa for purposes of gustatory sensory transduction. These nerves are associated with symptoms in Covid-19 positive patients, which dysosmia, anosmia, dysgeusia, ageusia manifestation, among other neurosemiological characteristics. It is concluded that these semiological characteristics may be due to neurotropic and transynaptic mechanisms, therefore a more rigorous neurological examination should be performed on symptoms and signs of Covid-19 patients.
Subject(s)
Humans , Pneumonia, Viral , Coronavirus Infections , Cranial Nerves , Betacoronavirus , Olfactory Nerve , Trigeminal Nerve , Vagus Nerve , Facial Nerve , Glossopharyngeal NerveABSTRACT
Introducción: El hemiespasmo facial primario (HFP) se produce por la hiperexcitabilidad del nervio facial y sus núcleos de origen como consecuencia de la compresión vascular. La cirugía de descompresión neurovascular se plantea como alternativa al tratamiento médico refractario. Objetivos: Presentar nuestra experiencia respecto a esta patología. Material y métodos: Se realizó una revisión retrospectiva de pacientes operados por HPF refractarios a tratamiento médico en nuestra institución en los últimos 5 años (periodo 2014-2019). Todos fueron intervenidos vía retrosigmoidea. Se evaluaron datos demográficos, evaluación prequirúrgica y evolución postoperatoria. Resultados: Se operaron 4 pacientes bajo técnica microquirúrgica asistido por endoscopía. Edad promedio 52 años (rango 41-61) con una relación femenino masculino 3:1. El 25% (n=1) presentaba paresia facial grado 2 (HB) en el prequirúrgico. No hubo cambios en cuanto al grado de paresia facial en el postoperatorio en ningún caso. Sólo un paciente registró caída leve en la audiometría postquirúrgica. El 75% (n=3) resolvieron el HFP. Conclusión: Si bien nuestra serie es acotada a un número reducido de pacientes, la cirugía descompresiva microvascular es efectiva como alternativa al tratamiento médico refractario del HFP.
Introduction: Primary hemifacial spasm (PHS) is defined as the hyper excitability of the nerve due to the compression of the facial nerve or its nuclei, most commonly by a vascular structure. The surgical indication for microvascular decompression is resistance to pharmacological treatment or severe adverse effects. Objectives: To present our experience in the surgical treatment of this pathology with this novel technique. Materials and methods: We retrospectively reviewed all patients (n=4) with a diagnosis of PHS, who underwent endoscope-assisted microvascular decompression surgery in our institution during the last 5 years. In all the cases, we choose the retrosigmoid approach. We evaluated demographic data, preoperative evaluation, and post-operative evolution. Results: Endoscope-assisted microvascular decompression was the surgical technique in all the patients. The median age was 52 years, the female-male ratio of 3:1. Only one patient presented a grade 2 facial palsy (House-Brackmann scale) in the preoperative evaluation; there were no significant changes in the post-operative evaluation in any patient. Only one patient experienced worsening in the post-operative audiometric follow-up. The 75% (n=3) of the patients solved the HFP after the surgical treatment. Conclusion: By taking into account our experience in this small case series, we can support the concept that endoscope-assisted microvascular decompression is as effective as the open surgical treatment of the PHS.
Subject(s)
Hemifacial Spasm , Skull Base , Decompression , Endoscopy , Facial Nerve , Facial Paralysis , Microvascular Decompression SurgeryABSTRACT
Abstract Introduction Local anesthesia with sedation has been employed for an increasingly number of otolaryngology procedures, and might be associated with lower surgical morbidity and costs. Facial nerve monitoring is often advisable in otology to minimize the risks of injuries to this cranial nerve, but the principles, techniques and parameters involved have only been studied for procedures under general anesthesia. Objective To report the preliminary outcomes of intraoperative facial nerve moni- toring during otologic procedures under sedation and local anesthesia. Methods A total of five procedures and their respective intraoperative electrophysi- ological main findings were described. Facial neuromonitoring was performed using the same device by an electrophysiologist. The monitor sensitivity was set at 100 mV, and a stimulating probe was used whenever needed. Results Progressively decreasing low-amplitude baseline values were usually obtained as the level of anesthesia increased, with isolated oscillations possibly related to some degree of voluntary muscular activity. These oscillations could be easily distinguished from those of the surgical manipulation or electrical stimulation of the nerve, which tended to be of much greater amplitude and shorter latency, occurring during specific surgical steps. Conclusion With a surgical team with proper procedural knowledge and broad expertise regarding the technique, intraoperative facial nerve monitoring under local anesthesia with sedation seemed both feasible and reliable. Thus, the need for intraoperative neuromonitoring should not be an obstacle for otologic procedures under less aggressive anesthetic management.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Otologic Surgical Procedures/methods , Monitoring, Intraoperative/methods , Facial Nerve/physiology , Anesthesia, Local , Treatment Outcome , Electric Stimulation , ElectromyographyABSTRACT
INTRODUCCIÓN: El adenoma pleomorfo es el tumor benigno más común de las glándulas salivales y particularmente de la glándula parótida, la característica principal de este tumor benigno es su crecimiento lento, provocando la presencia notoria de una masa a nivel facial o cervical. Su tratamiento es quirúrgico y uno de los principales riesgos, es la posibilidad de parálisis facial posquirúrgica. Presentamos un caso, resuelto de forma quirúrgica mediante parotidectomía parcial, que conlleva la disección del nervio facial. CASO CLÍNICO: Se trató de una paciente de sexo femenino de 34 años de edad que acude para valoración por presentar masa de crecimiento lento en región parotídea derecha, negó asociación con dolor o parálisis facial. Luego de valoración tomográfica y por PAAF, se diagnosticó Adenoma Pleomorfo de parótida y se decidió parotidectomía parcial derecha. EVOLUCIÓN: Para el tratamiento quirúrgico se recurrió a la técnica descrita en la bibliografía con la variante en la incisión, se usó incisión modificada de Blair. Se logró extirpar la totalidad del tumor. Paciente en su postquirúrgico mediato, presentó parálisis facial, tratada con corticoides, fue dada de alta con una puntuación de House Brackmann CONCLUSIÓN: En concordancia con la bibliografía citada, el manejo adecuado de esta patología es netamente quirúrgico, la realización de parotidectomía en casos de tumoración de glándulas salivales es la única manera de evitar que la masa provoque lesiones a nivel de estructuras cercanas, como el nervio facial. Su correcta disección e identificación están dentro de los principales asuntos dentro del procedimiento.(au)
BACKGROUND: Pleomorphic adenoma is the most common benign tumor of the salivary glands, particularly of the parotid gland. The main characteristic of this benign tumor is its slow growth, causing the noticeable presence of facial or cervical mass. The treatment is surgery, with the main risk of postoperative facial paralysis. We present a case report, resolved surgically with a partial parotidectomy, which involves dissection of the facial nerve. CASE REPORTS: A 34 year old female patient, seeking medical attention due to a slow-growing mass in the right parotid region. Patient denied associated symptoms. After CT and Fine needle puncture, the patient was diagnosed of a pleomorphic adenoma of the parotid gland, and treated with right partial parotidectomy. EVOLUTION: The surgical technique used is described on literature, with a variant in the incision type. We used modified Blair incision. The whole tumor was removed. After surgery patient presented with facial paralysis, she was treated with corticoids. Patient was discharged with a House Brackmann 1 score. CONCLUSIONS: Accordingly with literature, the resolution of this pathology is surgical, paratidectomy is the only treatment that avoids the mass causing damage to adjacent structures, like the facial nerve. The proper identification and dissection of this nerve, is one of the main concerns of the procedure.(au)
Subject(s)
Humans , Female , Adult , Parotid Gland , Adenoma, Pleomorphic , Facial Nerve , Neoplasms , MethodsSubject(s)
Humans , Male , Adult , Young Adult , Ear Canal/diagnostic imaging , Ear Diseases/diagnostic imaging , Facial Nerve/diagnostic imaging , Facial Paralysis/diagnostic imaging , Keratosis/diagnostic imaging , Tomography, X-Ray Computed , Diagnosis, Differential , Ear Canal/pathology , Ear Diseases/pathology , Facial Paralysis/etiology , Keratosis/complications , Keratosis/pathologyABSTRACT
Abstract Purpose To evaluate the normality pattern in functional tests of peripheral nerves. Methods Sixty female and sixty male Wistar rats were submitted to vibrissae movement and nictitating reflex for facial nerve; grooming test and grasping test for brachial plexus; and walking tracking test and horizontal ladder test for lumbar plexus. The tests were performed separately, with an interval of seven days between each. Results All animals showed the best score in vibrissae movement, nictitating reflex, grooming test, and horizontal ladder test. The best score was acquired for the first time in more than 90% of animals. The mean of strength on the grasping test was 133.46±12.08g for the right and 121.74±8.73g for the left anterior paw. There was a difference between the right and left sides. There was no difference between the groups according to sex. There is no statistical difference comparing all functional indexes between sex, independent of the side analyzed. The peroneal functional index showed higher levels than the sciatic and tibial functional index on both sides and sex. Conclusions The behavioral and functional assessment of peripheral nerve regeneration are low-cost, easy to perform, and reliable tests. However, they need to be performed by experienced researchers to avoid misinterpretation.
Subject(s)
Animals , Male , Female , Rats , Peripheral Nerve Injuries , Sciatic Nerve , Brachial Plexus , Rats, Wistar , Facial Nerve , Nerve RegenerationABSTRACT
OBJECTIVE@#To investigate the clinical efficacy of a modified paramedian lower lip-submandibular approach for maxillary (subtotal) total resection.@*METHODS@#Eleven patients of maxillary tumors underwent maxillary (subtotal) total resection through the modified paramedian lower lip-submandibular approach. Clinical follow-up visits were conducted to evaluate appearance restoration, facial nerve functional status, parotid gland functional status, and orbital region complication.@*RESULTS@#During the follow-up period of 6-36 months, the appearance of all 11 patients recovered well. All cases presented hidden scars. No facial nerve and parotid duct injury, lower eyelid edema, lower eyelid ectropion, or epiphora in all cases was observed.@*CONCLUSIONS@#Applying modified paramedian lower lip-submandibular approach to maxillary (subtotal) total resection effectively reduces incidence of orbital region complications including lower eyelid edema, lower eyelid ectropion, and epiphora, which often occur to traditional approach. The modified approach produces more subtle scars than other methods and should be applied to treatment of maxillary (subtotal) total resection.
Subject(s)
Facial Nerve , Humans , Lip , Maxilla , Maxillary Neoplasms , Surgical FlapsABSTRACT
OBJECTIVE@#To propose and evaluate the clinical effect of midpiece facial nerve dissection through transparotid approach in regional parotidectomy.@*METHODS@#A total of 136 patients with benign parotid tumors were categorized into three groups according to the way of facial nerve dissection: anterograde dissection from main trunk (anterograde, n=70), retrograde dissection from distal branches (retrograde, n=34), and midpiece dissection through transparotid approach (middle dissection, n=32). Surgery duration, facial nerve injury, salivary fistula, earlobe sensation, Frey's syndrome, and aesthetic evaluation were compared.@*RESULTS@#The surgery duration in the middle dissection group was significantly shorter than that in the other two groups. The proportion of salivary fistula was higher in the anterograde group (9 cases, 12.9%; P<0.05) compared with that in the other groups. Postoperative facial nerve injury was similar between the middle dissection (1 case, 3.1%) and anterograde groups (3 cases, 4.3%) with lower injury rate compared with the retrograde group (7 cases, 20.6%). The anterograde group had more cases of hypoesthesia of the earlobe (12 cases, 17.1%; P<0.05) than the other two groups. Aesthetic score was higher in the anterograde and middle dissection groups compared with that in the retrograde group (P<0.05).@*CONCLUSIONS@#Midpiece facial nerve dissection is technically feasible and clinically viable in regional parotidectomy.
Subject(s)
Esthetics, Dental , Facial Nerve , Humans , Parotid Gland , Parotid Neoplasms , Postoperative Complications , Retrospective Studies , Sweating, GustatoryABSTRACT
OBJECTIVE@#To systematically evaluate the repairing effect of stem cells on facial nerve defects.@*METHODS@#Articles regarding the regenerating effect of stem cells on facial nerves in animals were collected from the databases of Pubmed, Cochrane Library, Web of Science, Embase, Scopus, and CBM. Two professionals independently completed the article screening, data extraction, and bias risk assessment. RevMan 5.3 and random-effects models were used for the statistical analysis, and the results were presented in the form of mean differences (MD) with a 95%CI. The results of functional evaluation (vibrissae movement, facial paralysis) and histological evaluation (density of myelinated fibers, diameter of fibers, thickness of myelin sheath, G ratio) of facial nerve were Meta-analyzed.@*RESULTS@#A total of 4 614 articles were retrieved from the 6 databases, and 15 of these articles were included in the Meta-analysis. For vibrissae movement and facial paralysis, the stem cell group scored significantly higher than the non-stem cell group (P<0.05). The density of myelinated fibers and thickness of the myelin sheath in the stem cell group were higher than those in the non-stem cell group (P<0.05). The G ratio in the stem cell group was smaller than that in the non-stem cell group (P=0.001). There was no significant difference in fiber diameter (P=0.08).@*CONCLUSIONS@#Stem cells have potential in promoting facial nerve regeneration.