Two-Dimensional Geometric Morphometric Method on Frontal Sinus for Race Estimation: A Lateral Skull Radiograph Study

@#Introduction: Race estimation of unknown individual is essential in forensic investigation. The resiliency of frontal sinus makes it a potential tool for biological profiling, particularly in cases where fragmented skeleton persists. Geometric morphometrics is an efficient way to characterise shape. However, the use of frontal sinus to identify race of Malaysians is yet to be investigated. This research employed a two-dimensional (2D) geometric morphometric to examine the morphological differences of the frontal sinus among the major races in Malaysia. Methods: Lateral skull radiographs which comprising of 453 adult Malaysian (151 Malays, Chinese and Indian respectively) were used. The 2D landmarks of eight were placed on the digitalized radiographs and 2D geometric morphometric analysis was performed using MorphoJ software. Results: Procrustes ANOVA revealed a significantly different frontal sinus shape (p-value < 0.05) between races. Canonical variate analysis showed significantly different frontal sinus morphology (p-value < 0.05) between Malay and Indian as well as Chinese and Indian. Discriminant function analysis with cross-validation demonstrated a 57.4% accuracy rate. Conclusion: This population-specific study based on frontal sinus of Malaysians using the 2D geometric morphometric, though less reliable, sheds new light on the potential applicability of this method for race estimation purpose.

Abordaje endoscópico extendido del seno frontal: Experiencia en Hospital Clínico Universidad de Chile / Extended endoscopic approach of the frontal sinus: Experience at Hospital Clínico Universidad de Chile

Introducción: El seno frontal es una estructura compleja y desafiante en términos quirúrgicos, siendo descritas numerosas técnicas para su abordaje. Dentro de ellas se destaca el abordaje endoscópico extendido de seno frontal: Draf IIB y Draf III, como una importante alternativa para resolución de patología refractaria de seno frontal. Objetivo: Describir las características de pacientes sometidos a abordaje endoscópico extendido de seno frontal en Hospital Clínico Universidad de Chile (HCUCH). Material y Método: Estudio retrospectivo, descriptivo. Se incluyeron a pacientes sometidos a abordaje endoscópico extendido de seno frontal entre los años 2013 y 2021. Se analizaron variables clínicas, intraoperatorias y de seguimiento. Resultados: Se registraron 118 pacientes, de los cuales 64 cumplieron criterios de inclusión al estudio, con una edad promedio de 48 años. La patología más frecuente fue la rinosinusitis crónica poliposa (42%) seguido del mucocele (20%). Del total de pacientes, el 68% fue sometido a cirugía Draf IIB y el resto a Draf III. Todos los pacientes fueron estudiados con endoscopía e imágenes, y seguidos con parámetros clínicos y endoscópicos. El porcentaje de estenosis postoperatoria se estimó en 10%. Conclusión: El abordaje endoscópico nasal extendido figura como una alternativa útil para manejo de patología de seno frontal refractario a tratamiento. En nuestra experiencia las indicaciones, tipos de cirugía y tasa de complicaciones son concordantes con la literatura internacional.

Introduction: The frontal sinus is a complex and challenging structure in surgical terms, numerous techniques have been described for its approach, among them the extended endoscopic approach: Draf IIB and Draf III, figures as an important alternative for the resolution of refractory pathology of frontal sinus. Aim: To describe the characteristics of patients who underwent an extended endoscopic approach to the frontal sinus at the Hospital Clínico Universidad de Chile (HCUCH). Material and Method: A retrospective, descriptive study included patients who underwent an extended endoscopic approach to the frontal sinus between 2013 and 2021. Clinical, intraoperative, and follow-up variables were analyzed. Results: 118 patients were registered, of which 64 met the inclusion criteria for the study, with an average age of 48 years. The most frequent pathology was chronic polypous rhinosinusitis (42%), followed by mucocele (20%). Of the patients, 68% underwent Draf IIB surgery, while the rest received a Draf III type procedure. All patients were studied with endoscopy and images and followed up with clinical and endoscopic parameters. The percentage of post operatory stenosis was 10%. Conclusion: The extended nasal endoscopic approach appears as a valuable alternative for managing frontal sinus pathology refractory to treatment. In our experience, the indications, types of surgery, and rate of complications are consistent with the international literature.

International Frontal Sinus Anatomy Classification (IFAC): evaluation of frontoethmoidal cells prevalence in a Brazilian population

Abstract Objectives: The aim of this study was to evaluate the prevalence of the frontal cell variants according to International Frontal Sinus Anatomy Classification (IFAC), in the population of a Brazilian tertiary hospital, and analyze the reliability of the classification between observers. Methods: A cross-sectional study in the Hospital de Clínicas of the State University of Campinas, Brazil. One hundred and three Computed Tomography's (CTs) were evaluated by radiologists and otorhinolaryngologist to estimate the prevalence of frontoethmoidal cells according to the IFAC. Intraclass Correlation Coefficient (ICC) among examinators was used to evaluate reliability of this findings. Results: 103 CT scans, totaling 206 sides, were evaluated independently. The agger nasi cell was the most prevalent, present in 95.63% of cases, 37.86% of the exams contained supra agger cells, frontal supra agger cell showed prevalence 37.37%; suprabularcell was present in 77.18% of the sides. As for the frontal suprabular cell, the prevalence was 30.09%, the supraorbital ethmoid cell was present in 32.03%, and frontal septal cell had a 33.49% prevalence. The ICC among the evaluators was classified as "good reliability" or "excellent reliability" for all cells. Conclusion: This study describes the frontal cell prevalence among a population in tertiary Brazilian hospital, using the IFAC. This classification had a high ICC. Level of evidence: Level 2: Individual cross-sectional study with consistently applied reference standard and blinding.

Human Identification by Comparative Analysis of Frontal Sinuses: Study on Computed Tomography

ABSTRACT: Generally, primary methods of identification as the fingerprint analysis, dental analysis or DNA examination are indicated for the establishment of the identity of a corpse. In situations with poor body conservation, such as in advanced stage of putrefaction or skeletonization, imaging exams like medical and dental computed tomography can assist in the process of identification. The frontal sinuses present anatomical characteristics that allow the establishment of the identity of an in dividual. In this case report we used the technique of three-dimensional construction of the frontal sinuses through the generation of solid figures representative of the sinus morphology. After the comparative analysis of the antemortem and postmortem tomography of the alleged victim, we could establish similarities in both the variations in size, shape, symmetry and contour of borders, and the presence and number of septa, allowing us to infer that the two images described belong to the same individual, thus establishing the identity of the corpse found.

RESUMEN: Generalmente, los métodos primarios de identificación como el análisis dactiloscópico, el análisis dental o el examen de ADN están indicados para el establecimiento de la identidad de un cadáver. En situaciones de mala conservación del cuerpo, como en etapa avanzada de putrefacción o esqueletización, los exámenes de imagen como la tomografía computarizada médica y dental pueden ayudar en el proceso de identificación. Los senos frontales presentan características anatómicas que permiten establecer la identidad de un individuo. En este reporte de caso utilizamos la técnica de construcción tridimensional de los senos frontales a través de la generación de figuras sólidas representativas de la morfología sinusal. Tras el análisis comparativo de la tomografía antemortem y postmortem de la presunta víctima, pudimos establecer similitudes tanto en las variaciones de tamaño, forma, simetría y contorno de márgenes, como en la presencia y número de septos, lo que nos permite inferir que las dos imágenes descritas pertenecen al mismo individuo, estableciéndose así la identidad del cadáver encontrado.

Endoscopic management of frontal sinus CSF leaks / Manejo endoscópic de fístulas liquóricas do seio frontal

Abstract Introduction: Endoscopic management of frontal sinus cerebrospinal fluid leaks has become the gold standard of treatment, with high success rates and low morbidity. The aim of this study is to review our experience in managing this challenging condition. Objective: To review our experience in treating frontal sinus cerebrospinal fluid leaks through an endonasal endoscopic approach. Methods: A retrospective evaluation of patients undergoing endoscopic surgery for frontal sinus cerebrospinal fluid leaks was performed. Demographics, defect location and etiology, surgical and reconstructive technique, complications, and postoperative followup were examined. Results: Twenty-two patients with a mean age of 40.4 years were treated surgically by the senior author between 2015 and 2019. Cerebrospinal fluid leak was either traumatic (17) or spontaneous (5). Successful first-attempt endoscopic repair was accomplished in all cases. A combined endoscopic-trephination approach was necessary in 5 patients (22.8%). No serious complications were reported, and frontal sinus drainage pathway was patent in all our cases. Revision surgery was necessary in only 2 patients for synechia formation. The mean patient followup was 22.7 months (range: 7 - 41 months). Conclusion: Progress in the field of endoscopic surgery has shifted the paradigm, establishing endoscopic repair of frontal sinus leaks as the standard of care. A few remaining limits of this approach could be addressed by combining endoscopy with frontal trephination.

Resumo Introdução: O manejo endoscópico das fístulas liquóricas do seio frontal tornou-se o padrão-ouro, com altas taxas de sucesso e baixa morbidade. Objetivo: Revisar nossa experiência no tratamento de fístulas liquóricas do seio frontal por meio de uma abordagem endoscópica endonasal. Método: Foi feita uma avaliação retrospectiva de pacientes submetidos à cirurgia endoscópica para fístulas liquóricas do seio frontal. Dados demográficos, localização e etiologia do defeito, técnica cirúrgica e reconstrutiva, complicações e seguimento pós-operatório foram analisados. Resultados: Foram tratados cirurgicamente pelo autor principal 22 pacientes com média de 40,4 anos entre 2015 e 2019. A fístula liquórica foi traumática (17) ou espontânea (5). O reparo endoscópico foi feito com sucesso na primeira tentativa em todos os casos. Uma abordagem combinada de trefinação e endoscopia foi necessária em 5 pacientes (22,8%). Nenhuma complicação grave foi relatada e a via de drenagem do seio frontal estava patente em todos os nossos casos. A cirurgia de revisão foi necessária em apenas 2 pacientes devido à formação de sinéquia. O seguimento médio dos pacientes foi de 22,7 meses (variação: 7 a 41). Conclusão: O progresso no campo da cirurgia endoscópica mudou o paradigma, estabeleceu o reparo endoscópico de fístulas liquóricas do seio frontal como o padrão de tratamento. Alguns poucos limites remanescentes dessa abordagem podem ser resolvidos pela combinação da endoscopia com a trefinação frontal.

Mucocele fronto-etmoidal gigante / Giant frontoethmoidal mucocele

Se presenta el caso de un paciente varón de 18 años, con un gran mucocele frontoetmoidal derecho, postoperado en dos oportunidades anteriores, que acudió a nuestro servicio por un empeoramiento de la diplopía. Al examen físico se visualizaba un desplazamiento del globo ocular hacia abajo y afuera. Se le realizó estudios de imágenes, una tomografía computarizada y una resonancia magnética nuclear que sugerían un mucocele frontoetmoidal derecho. Se le realizó una sinusotomía tipo Draf III para drenaje de la lesión, con mejoría de los síntomas.

We present the case of an 18-year-old male patient with a large right frontoethmoidal mucocele, postoperatively on two previous occasions, who came to our department due to worsening diplopia. Physical examination revealed a downward and outward displacement of the eyeball. Imaging studies, computed tomography, and magnetic resonance imaging were performed that suggested a right frontoethmoidal mucocele. A type Draf III sinusotomy was performed to drain the lesion, with improvement of the symptoms.

Postmortem cross-sectional slicing of the frontal sinuses and comparison with antemortem anatomical imagens ­ a technical description / Secção transversal postmortem dos seios frontais e comparação com imagens antemortem ­ descrição de técnica

The anatomical features of the frontal sinuses (FS) are known as highly distinctive and potentially useful for human identification. Assessing these structures with advanced postmortem (PM) imaging, however, is not always feasible in medicolegal units worldwide. This study proposes and validates the anatomical assessment of the FS via cross-sectional slicing of the frontal bone to reproduce images comparable to antemortem (AM) axial views. The bodies of two unknown sisters with advanced decay (decomposition stage III.1) were referred for human identification. The AM data provided for comparative analysis consisted of multi-slice computed tomography (CT) and magnetic resonance images of the skull. In the lack of primary alternatives for human identification, PM assessment of the FS was considered. Justified by the mortuary facilities there were not equipped with CT devices, sequential cross-sectional slicing of the frontal bone was performed. With the skulls in supine position, the technique followed Griesinger's anteroposterior plane using an oscillating saw blade at 90°. Multiple slices (n = 20) of the frontal bone were obtained in craniocaudal direction up to the superior limit of the orbits. The outline of the FS, as well the number of lobes and position of the intersinus septum were visible and compatible with the AM data, enabling positive identification. External validation of the proposed technique was accomplished by reproducing it to successfully identify a male victim in a medicolegal institute 2,000 KM far from the original site

As características anatômicas dos seios frontais (FS) são consideradas distintivas e potencialmente uteis para a identificação humana. A análise imaginológica postmortem (PM) destas estruturas, contudo, não sempre é viável. O presente trabalho tem como objetivo a apresentação e validação de uma proposta de análise anatômica dos seios frontais utilizando a secção do osso frontal a fim de se permitir comparações com imagens axiais antemortem (AM). A corpo de um indivíduo do sexo masculino, não identificado, e em avançado estado de decomposição (estágio III.1) foi encaminhado para identificação. Os dados AM providenciados para análise comparativa consistiram em imagens de tomografia computadorizada (CT) multi-slice e ressonância magnética do crânio. Na falta de alternativas primárias para identificação humana, a análise dos seios frontais (SF). Pelo fato de que o instituto médico-legal era desprovido de unidades de Imaginologia avançada, cortes sequenciais do seio frontal foram realizados. Com os crânios em posição supina, a técnica foi conduzida seguindo o plano anteroposterior de Griesinger's com uma serra oscilatória em 90°. Secções múltiplas (n = 20) do osso frontal foram obtidas no sentido craniocaudal até o limite superior das orbitas. A anatomia dos SF, assim como o número de lobos e a posição do septo intersinual eram visíveis e compatíveis com os dados AM, viabilizando a identificação positiva. A validação externa da técnica proposta se deu durante a identificação de uma vítima do sexo masculino periciada em um instituto médico-legal 2.000Km distante do centro originalmente relatado no presente estudo

Research Progress on Individual Identification by Frontal Sinus Imaging / 法医学杂志

Frontal sinus imaging is an important research object in forensic individual identification due to the highly specific irregular air cavity shape of frontal sinus, the stability of its shape after maturity, and the wide clinical application of radiology technology. The use of frontal sinus imaging for individual identification has significance in the court. When the application of traditional individual identification methods such as fingerprint identification and DNA analysis are limited or cannot be effectively carried out, or when the corresponding dental records are lacking and in other special cases, individual identification with frontal sinus imaging comparison is an effective alternative. Various types of image data can be used for individual identification with frontal sinus, mainly based on artificial visual comparing. With limitations such as, high professional requirements, low efficiency and small application range, the methods cannot be used in mass disasters. In recent years, some computer image recognition techniques have been used in identification of frontal sinus imagings and can significantly improve the efficiency of recognition. Difficulties such as low manual recognition efficiency may be overcomed. This study summarizes the reports on forensic individual identification using frontal sinus imaging, to review the research progress on individual identification with frontal sinus imaging, to provide a reference for further research on frontal sinus imaging, and to provide ideas for exploration and establishment of a faster, more efficient and more accurate individual identification system.

Abordagem cirúrgica imediata de fratura de seio frontal: relato de caso / Immediate surgical approach of frontal sinus fracture: a case report

Objetivo: O seio frontal é uma cavidade óssea pneumática, localizada entre o esplenocrânio e o neurocrânio, contidos entre a fossa craniana anterior e a região naso-órbito-etmoidal. As fraturas do seio frontal são originadas a partir de acidentes de grande intensidade. Traumas na região pode afetar a lâmina anterior e/ ou posterior, com ou sem envolvimento do ducto nasofrontal. O tratamento das fraturas do seio frontal de forma adequada apresenta grande significado clínico, pois as sequelas geradas podem trazer transtornos funcionais e estéticos importantes, envolvendo relação multiprofissional entre as equipes de neurocirurgia e cirurgia buco-maxilo-facial. O objetivo deste artigo é relatar um caso de intervenção cirúrgica imediata para remoção de corpo estranho na região seio frontal e redução e fixação da fratura seio frontal após acidente automobilístico em paciente jovem do gênero masculino. Material e Método: Sob indução de anestesia geral, foi realizado redução e fixação da fratura do osso frontal por meio de mini-placas de titânio. Resultados: Paciente evoluiu de maneira satisfatória, com restabelecimento do contorno estético aceitável do osso frontal, sem qualquer cosmético e funcional. Conclusão: Mesmo com as incongruências na literatura atual, em relação ao momento de abordagem de fraturas relacionadas ao seio frontal, o manejo mais precoce possível se mostra uma vertente com resultados satisfatórios, e com menores índices de complicações, devendo ser considerado sempre como uma possibilidade.

Objective: The frontal sinus is a pneumatic bone cavity located between the splenocranium and the neurocranium, contained between the anterior cranial fossa and the naso-orbital-ethmoid region. Frontal sinus fractures originate from accidents of high intensity. Trauma to the region can affect the anterior and / or posterior lamina, with or without nasofrontal duct involvement. Proper treatment of frontal sinus fractures has great clinical significance, as the sequelae generated can bring important functional and aesthetic disorders, involving a multi-professional relationship between neurosurgery and facial buccomaxillary surgery teams. The aim of this paper is to report a case of immediate surgical intervention for removal of the frontal sinus foreign body and reduction and fixation of the frontal sinus fracture after a car accident in a young male patient. Material and Method: Under induction of general anesthesia, a reduction and fixation of the frontal bone fracture was performed using titanium mini-plates. Results: Patient evolved satisfactorily, with restoration of the acceptable aesthetic contour of the frontal bone, without any cosmetic and functional. Conclusion: Even with the incongruencies in the current literature, in relation to the moment of approaching fractures related to the frontal sinus, the earliest possible management is shown to be an aspect with satisfactory results, and with lower rates of complications, and should always be considered as a possibility.

The Frontal Sinus and Frontal Recess: Anatomical, Radiological and Surgical Concepts

Abstract Introduction The frontal sinus (FS) is the most complex of the paranasal sinuses due to its location, anatomical variations and multiple clinical presentations. The surgical management of the FS and of the frontal recess (FR) is technically challenging, and a complete understanding of its anatomy, radiology, main diseases and surgical techniques is crucial to achieve therapeutic success. Objectives To review the FS and FR anatomy, radiology, and surgical techniques. Data Synthesis The FS features a variety of anatomical, volumetric and dimensional characteristics. From the endoscopic point of view, the FR is the point of greatest narrowing and, to have access to this region, one must know the anatomical limits and the ethmoid cells that are located around the FR and very often block the sinus drainage. Benign diseases such as chronic rhinosinusitis (CRS), mucocele and osteomas are the main pathologies found in the FS; however, there is a wide variety of malignant tumors that can also affect this region and represent a major technical challenge to the surgeon. With the advances in the endoscopic technique, the vast majority of diseases that affect the FS can be treated according to Wolfgang Draf, who systemized the approaches into four types (I, IIa, IIb, III). Conclusion Both benign and malignant diseases that affect the FS and FR can be successfully managed if one has a thorough understanding of the FS and FR anatomy, an individualized approach of the best surgical technique in each case, and the appropriate tools to operate in this region.

Evaluación radio-anatómica del receso del seno frontal en población colombiana / Radio-anatomic evaluation of the frontal sinus recess in colombian population

Objetivos: La cirugía endoscópica del seno frontal es quizá uno de los procedimientos más complejos en el manejo endoscópico de los senos paranasales debido a su localización y a las múltiples variantes anatómicas que pueden encontrarse durante su disección. Es indispensable conocer al detalle la anatomía quirúrgica de esta región en nuestra población, para optimizar la planeación quirúrgica de los pacientes. Actualmente en nuestro país se desconoce la frecuencia de estas variaciones. El objetivo del proyecto es evaluar la frecuencia de las variables anatómicas del seno frontal y realizar un estudio radio-anatómico en una muestra de pacientes en Colombia. Diseño del estudio: Observacional, descriptivo de tipo transversal. Métodos: Muestra aleatorizada de 406 tomografías computarizadas de senos paranasales que incluyeron 812 senos frontales recolectados durante el año 2018 Resultados: La celdilla suprabular fue la más comúnmente reportada con una frecuencia de 59.61%. La segunda celdilla fue la supra agger nasi con una frecuencia de 57.88%, seguido de la celdilla supra agger frontal (25.12%), celdilla suprabular frontal (22.17%), celdillas supraorbitarias (34.98%) y las celdilla frontal intersinusal (24,14%). La arteria etmoidal anterior se reportó colgante en un 31.28% y el diámetro AP más frecuente fue entre 5 -10 milímetros. Conclusiones: Para realizar una sinusotomía frontal endoscópica de forma adecuada es necesario conocer al detalle la anatomía del receso del seno frontal. Las diferentes variantes radio-anatómicas son muy frecuentes en el grupo poblacional estudiado. Creemos que este trabajo permitirá a los cirujanos un mejor entendimiento de esta región de difícil acceso quirúrgico en nuestra población. Palabras clave: Seno frontal, senos paranasales, seno clasificación frontal, cirugia endoscopica nasosinusal

Objectives: Endoscopic frontal sinus surgery is perhaps, one of the most complex procedures in the endoscopic sinus surgery, due to its anatomical location and the multiple anatomical variants that can be found. It is essential to know in detail the anatomy of this region in order to obtain a better understanding for the surgical planning. Currently, the frequency of these anatomical variations remains unknown in our country. Therefore, the objective of the study is to evaluate the frequency of the anatomical variants of the frontal sinus and to carry out a radio-anatomic study in a sample of patients from Colombia. Study design: Observational, cross-sectional descriptive. Methods: Randomized sample of 406 CT scan of the paranasal sinuses that included 812 frontal sinuses collected during the year 2018. Results: The supra bulla cell was the most frequently reported with a frequency of 59.61%. The second cell was the supra agger (57.88%) followed by supra agger frontal cell (25.12%), supra bulla frontal cell (22.17%), supraorbital ethmoid cells (34,98%) and frontal septal cell (24,14%) . The anterior ethmoidal artery was found hanging in 31.28% and the most frequent AP diameter was between 5 -10 mm. Conclusions: To perform an appropriate endoscopic frontal sinusotomy, it is necessary to know in detail the anatomy of the frontal sinus recess. The different radio-anatomical variants of the frontal sinus are very frequent in the population group studied. We believe that this study will allow surgeons to obtain a better understanding of this anatomical region of difficult surgical access.

Developmental and Morphological Variations of Frontal Sinus in Pediatric Age Group in Gurugram Region of Haryana – A Study

Background: The aim is to know gender wise development and morphological variation of the frontal sinus in the pediatric age group of Gurugram district of Haryana. The development and pneumatisation of the frontal sinus is the predictor of skeletal growth pattern. The craniofacial structures grow proportionately with the normal development of the body structures. Methods: In this prospective study, a total of 36 subjects were studied. The study was conducted in the Department of Radiodiagnosis of SGT Medical College, Budhera (Gurugram) Haryana from January 2019 to March 2019. This included 12 females and 24 males falling in the age group of 8-18 years. The frontal sinuses were evaluated on various morphological features. Plain X-Ray of paranasal sinus was evaluated by Caldwell’s view. The sinuses were evaluated for width, height, number of scallops, septations and supraorbital cells. Results: Average width and height of left frontal sinuses were 23.8 mm with the range of 5.5 – 43 mm and 28.4 mm with the range of 13-45 mm respectively. Average width and height of right frontal sinuses were 20.4 mm with the range of 9.8 – 39 mm and 20 mm with the range of 13-38 mm respectively. The average number of scalloping on right and left were 1.9 and 2.19 respectively. The septations were noticed in 13 (36.11%) on left and in 16 (44.44%) on right side. Supraorbital cells were found in 16 (44.44%) on left side and 17 (47.22%) on right side. Conclusion: There is a lot of variation in the appearance and development of the frontal sinus in pediatric age group. The dimensions had been found smaller on right side as compared to left side. Scalloping and supraorbital cells had been found more on right side than on the left side. Septations were more on left side as compared to right side.

Human identification established by the analysis of frontal sinus seen in anteroposterior skull radiographs using the mento-naso technique ­ a forensic case report / Identificação humana pela análise do seio frontal em radiografias anteroposteriores com incidência mento-naso em crânio humano ­ um relato de caso pericial

Introduction: Human identification is a challenging task, especially when the available information detected during the dental autopsy is scarce. In this context, distinctive morphological information may play a valuable role as additional and alternative identifiers. Objective: To report a case of human identification aided by the morphological analysis of the frontal sinus through anteroposterior radiographs of the skull with the mento-naso technique. Material and methods: The body of an edentulous adult male highly decomposed was referred to the local medico-legal institute for identification. The alleged relatives of the victim provided the comparative antemortem data (AM) ­ consisting of an anteroposterior (AP) skull radiograph taken with mento-naso projection. A postmortem AP radiograph of the deceased was taken in order to reproduce the AM data and to enable a comparative procedure. Results: The morphological information of the frontal sinuses converged between AM and PM radiographs both for metric and non-metric evidences. Conclusion: The analysis of the frontal sinus may be an additional and alternative approach for human identification ­ especially for edentulous victims

Introdução: O processo de identificação humana é uma tarefa desafiadora, especialmente quando as informações disponíveis durante o exame cadavérico são escassas. Neste contexto, características morfológicas distintivas podem exercer um papel importante como fontes adicionais e alternativas para a identificação. Objetivo: Relatar um caso pericial de identificação humana realizada com o auxílio da análise das características morfológicas do seio frontal em radiografias anteroposteriores do crânio com incidência mento-naso. Materiais e métodos: O corpo de um adulto edêntulo em avançado estágio de decomposição foi encaminhado para o instituto médico-legal local visando identificação. Os supostos pais da vítima providenciaram material comparativo antemortem (AM) ­ o qual consistia de uma radiografia anteroposterior do crânio obtida com incidência mento-naso. Uma radiografia postmortem (PM) anteroposterior foi obtida do cadáver para viabilizar a comparação. Resultados: As características morfológicas dos seios frontais da vítima convergiram entre os dados AM e PM tanto para fatores métricos como para não-métricos. Conclusão: A análise do seio frontal pode ser uma ferramenta adicional e alternativa para a identificação humana ­ especialmente em vítimas edêntulas

Abordaje endoscópico del seno frontal mediante Draf III: experiencia de la Red de Salud UC Christus / The Draf III procedure as an endoscopic frontal sinus approach: Red de Salud UC Christus' experience

RESUMEN Introducción: El Draf III es una técnica quirúrgica que permite el abordaje endoscópico de los senos frontales. Fue descrita como un procedimiento de rescate para la rinosinusitis crónica (RSCr) frontal en que falla la cirugía estándar. Actualmente, su uso se ha extendido a otras aplicaciones. Objetivo: (1) Revisar las indicaciones del abordaje Draf III, (2) Revisar si el abordaje permitió el manejo adecuado de la patología y (3) Evaluar la permeabilidad de los senos frontales. Material y método: Estudio retrospectivo descriptivo. Se evaluaron los registros de pacientes sometidos a un abordaje Draf III entre los años 2013-2016 (n =11). Se revisaron las indicaciones quirúrgicas, utilidad del Draf III para manejar la patología, permeabilidad de los senos frontales y complicaciones quirúrgicas. Resultados: Indicaciones quirúrgicas incluyeron la RSCr con pólipos, osteoma frontoetmoidal, mucocele frontal, papiloma invertido y estesioneuroblastoma. En todos los casos, el abordaje permitió un adecuado manejo de la patología. Todos los pacientes presentaron permeabilidad adecuada del Draf III al último control. Un paciente debió ser reoperado a los 15,5 meses por recidiva de papiloma invertido. Ningún paciente requirió cirugía de revisión por estenosis crítica del Draf III. No hubo complicaciones quirúrgicas. Discusión: El Draf III fue útil para manejar la RSCr, patologías benignas del seno frontal, y como parte de un abordaje extendido a la fosa craneal anterior. Conclusión: En nuestra serie, el Draf III resultó ser una excelente opción quirúrgica para el tratamiento de diversas patologías del seno frontal.

ABSTRACT Introduction: The Draf III procedure is an effective approach for the management of frontal sinus disorders. It was originally described as a rescue procedure for the treatment of refractory frontal sinusitis. Currently, it can be used to treat a variety of other disorders. Aim: (1) To review the indications for the Draf III procedure, (2) To evaluate if it enabled appropriate management of the disease, and (3) To evaluate frontal sinus patency. Material and Method: Retrospective descriptive study. Clinical records of patients who underwent a Draf III procedure between the years 2013-2016 (n=11) were reviewed. Surgical indications, the appropriateness of the approach to manage the frontal sinus disease, frontal sinus patency, and complications were analyzed. Results: Surgical indications included chronic rhinosinusitis with polyps, frontoethmoidal osteoma, frontal mucocele, inverted papilloma and esthesioneuroblastoma. In all cases, the approach allowed adequate management of the pathology. All patients had adequate patency of the Draf III at their last follow-up. One patient required a revision Draf III at 15.5 months follow-up because of an inverted papilloma recurrence. No patient required revision surgery for critical stenosis of the Draf III. No surgical complications were observed. Discussion: The Draf III procedure was useful for the management of chronic rhinosinusitis, for benign frontal sinus pathologies, and as part of an extended approach to the anterior cranial fossa. Conclusion: In our series, the Draf III procedure was an excellent surgical option for the management of a variety of frontal sinus pathologies.

Restoration of the Fronto-Orbital Buttress with Primary Bone Fragments / 대한신경손상학회지

OBJECTIVE: Forehead deformities are often caused by lack of treatment or incorrect restoration of the frontal buttress, so the underlying frontal buttress should be restored to its previous position to ensure that the previous forehead contour is restored in cases of complex depressed skull fractures. However, since brain injuries from skull fractures could have fatal consequences, the clinical concern in primary surgery has been to save the patient's life, and cosmetic concerns have always been secondary. We retrospectively reviewed fronto-orbital fracture patients who underwent primary restoration with primary bone fragments or an alloplastic implant and compared the surgical outcomes of autologous bone (group 1) and artificial materials (group 2). METHODS: A retrospective review was conducted of 47 patients with fronto-orbital fractures between March 2012 and January 2018. The patients underwent primary reconstruction with primary bone fragments or an alloplastic implant. The surgical results were evaluated by the incidence of infection and cosmetic satisfaction of patients. RESULTS: Infections occurred in one patient (5%) in group 1 and in two patients (15.3%) in group 2, which was not a statistically significant difference. In contrast, at 6 months after surgery, patient satisfaction showed a statistically significant between-group difference (group 1: 4.32 points, group 2: 3.54 points, p=0.001). CONCLUSION: Primary reconstruction using fractured bone fragments is an effective and preferable method that could result in better surgical outcomes than restoration using an alloplastic implant.

Effect of anatomical changes of frontal recess and frontal sinus on airflow after nasalisation by image reconstruction and numerical simulation / 中华耳鼻咽喉头颈外科杂志

Objective@#To describe the influence of post-operative anatomical structure changes on nasal airflow characteristics by 3D reconstruction and numerical simulation in real cases after nasalisation with Draf Ⅲ so as to explore the correlation between the changes of anatomical structure and subjective symptoms as well as airflow characteristics.@*Methods@#Ten patients underwent nasalization with Draf Ⅲ in Department of Rhinology in Beijing Tongren Hospital from 2006 to 2018 were selected retrospectively. Postoperative follow-up of all patients was more than 1 year. All patients had no abnormalities in their paranasal sinus CT scans and Lund-Kennedy scores were 0 except scar. VAS scores including nasal obstruction, stimulation in frontal sinus, and headache were collected at the same period. The control model was a normal person. Numerical simulation was used for calculating airflow characteristics in deep inspiratory period of both models. Independent sample Mann-Whitney U test and Spearman correlation test were used by software SPSS 22.0.@*Results@#The airflow pressure in frontal sinus ostium was (7.21±1.39)×104 Pa (Mean±SD), which was lower than that in normal subjects (8.99×104 Pa) under deep inspiratory simulation. But, the velocities in frontal sinus ostium and frontal sinus were (40.10±2.46) m/s and (28.19±1.73) m/s respectively, which were higher than those in normal one (2.70 m/s, 0.73 m/s). The airflow patterns of the two models were basically similar. There was no significant difference in the opening size and volume of frontal sinus between different groups after grouped by three symptoms respectively. No correlation could be found between the opening size and volume of the frontal sinus with the appearance and severity of three subjective symptoms.@*Conclusions@#The airflow pattern and distribution after nasalisation with Draf Ⅲ are like those of normal person. There is no correlation between the changes of anatomy in frontal recess and frontal sinus and nasal airflow characteristics as well as subjective symptoms.

Application of mucosal flap technique in Draf type Ⅱb/Ⅲ frontal sinus surgery / 中华耳鼻咽喉头颈外科杂志

Draf type Ⅱb/Ⅲ frontal sinus surgery has been widely used in clinical practice. They can obtain a wide operating space and sufficient drainage pathways. However, the mucosa around the frontal sinus ostium was removed during the surgery, resulting in bone exposure, and sinus ostium stenosis or atresia may occur after the operation. In recent years, rhinologists at home and abroad have applied various mucosal flaps to cover the exposed bone around the frontal sinus orifice after Draf Ⅱb/Ⅲ frontal sinus surgery, in order to reduce scar formation and bone hyperplasia along with the incidence of frontal sinus ostium stenosis or atresia after surgery. Satisfactory results have been achieved. The article reviews the application of mucosal flap technique in Draf Ⅱb/Ⅲ frontal sinus surgery, in order to promote the clinical research and technical development of this technique in China.

Redução de seio frontal: abordagem bucomaxilofacial na terapia de reabilitação das fraturas panfaciais / Frontal sinus reduction: approach oral and maxillofacial rehabilitation therapy of pan facial fractures

Objetivo: relatar um caso clínico de fratura do seio frontal, com o manejo clínico e cirúrgico, as complicações e os benefícios dos tratamentos adotados. As lesões do seio frontal, na sua maioria, relacionam-se a traumas de grande amplitude, como acidentes com veículos automotores, agressões físicas, ferimentos com arma de fogo e acidentes em trabalhadores da construção civil, acometendo mais a população masculina entre 21 e 30 anos de idade, podendo afetar as paredes anterior e/ou inferior do seio frontal, incluindo fraturas naso- -órbito-etmoidal e zigomáticas. O seu envolvimento pode causar complicações relacionadas a cavidade intracraniana, órbita e/ou estruturas nasais, como sinusites recorrentes, osteomielite do osso frontal, mucocele ou mucopiocele, meningite, encefalite, abcesso cerebral ou trombose do seio cavernoso, podendo evoluir para o óbito do paciente. Os objetivos do tratamento são: prevenção de infecção, isolamento do conteúdo intracraniano, correção da drenagem de líquido cefalorraquidiano, restauração da função e da estética, podendo ser realizado por equipe multidisciplinar. Relato de caso: o presente trabalho expõe um caso de fratura fronto-naso-órbito-etmoidal com afundamento de seio frontal, confirmada por exame tomográfico de face, em um paciente masculino de 26 anos, vítima de acidente automobilístico, submetido a redução da parede anterior do seio frontal, imobilização e fixação interna rígida, com posterior redução fechada da fratura dos ossos nasais, tamponamento nasal anterior e contenção externa com micropore e gesso. Considerações finais: demonstrou-se com esse artigo a possibilidade de divergência de tomada de conduta das diferentes áreas envolvidas no tratamento e a importância do tratamento multidisciplinar. (AU)

Objective: to report a clinical case of frontal sinus fracture, clinical and surgical management, complications and benefits of the treatments adopted. Frontal sinus lesions, for the most part, are related to large-scale traumas such as accidents with motor vehicles, physical assault, gunshot wounds and accidents in construction workers, affecting more the male population between 21 and 30 years of age, and may affect the anterior and / or inferior wall of the frontal sinus including naso-orbito- ethmoidal and zygomatic fractures. Its involvement may cause complications related to the intracranial cavity, orbit and / or nasal structures such as recurrent sinusitis, osteomyelitis of the frontal bone, mucocele or mucopiocele, meningitis, encephalitis, cerebral abscess or thrombosis of the cavernous sinus, and may evolve to the death of these patients . The objectives of treatment are prevention of infection, isolation of intracranial content, correction of cerebrospinal fluid drainage, restoration of function and aesthetics, and can be performed by a multidisciplinary team. Case report: this paper reports a case of frontal-naso-orbito-orbito-ethmoidal fracture with frontal sinus sinking, confirmed by face tomography, in a 26-year-old male patient who had suffered an auto accident, submitted to a reduction of the anterior wall of the frontal sinus, immobilization and rigid internal fixation with posterior closed reduction of nasal bones fracture, anterior nasal packing and external restraint with micropore and gypsum. Final considerations: to demonstrate the possibility of divergence of the conduct of the different areas involved in the treatment and the importance of the multidisciplinary treatment. (AU)

Giant fronto-ethmoidal osteoma - selection of an optimal surgical procedure / Osteoma fronto-etmoidal gigante - escolha do procedimento cirúrgico ideal

Abstract Introduction Osteomas of the paranasal sinuses are benign bone tumours that produce clinical signs depending on their size and location. In most reported cases large tumours are excised by an external approach or in conjunction with an endoscopic technique. Endoscopic treatment of such tumours is a huge challenge for the operator. Objective Determine the optimal surgical approach by analysing giant osteomas of the frontal and ethmoidal sinuses in the literature. Methods Group of 37 osteomas obtained from the literature review. A group of osteomas removed only by endoscopy was compared with a group in which an external approach (lateral rhynotomy or craniotomy) or combined external and endoscopic approach was applied. Results The authors, based on the statistical analysis of the literature data, have found that the average size of osteomas excised endoscopically and those removed by external approaches does not differ statistically, when the osteomas are located in the ethmoidal cells (p = 0.2691) and the frontal sinuses (p = 0.5891). Conclusion The choice of surgical method appears to be independent of the osteoma size and the decision is likely to be taken based on the experience of the surgeon, available equipment and knowledge of different surgical techniques.

Resumo Introdução Osteomas dos seios paranasais são tumores ósseos benignos cujas manifestações clínicas ocorrem em função de seu tamanho e localização. Na maioria dos casos relatados os tumores grandes são excisados por uma abordagem externa ou associada a uma técnica endoscópica. O tratamento endoscópico destes tumores ainda é um grande desafio para o cirurgião. Objetivo Determinar a abordagem cirúrgica ideal ao analisar osteomas gigantes dos seios frontal e etmoidal na literatura. Método Um total de 38 osteomas foram avaliados a partir da revisão da literatura. Um grupo de osteomas removidos apenas por cirurgia endoscópica foi comparado com um grupo para o qual foi utilizado uma abordagem externa (rinotomia lateral ou craniotomia) ou uma abordagem combinada, externa e endoscópica. Resultados Os autores, com base na análise estatística dos dados da literatura, observaram que o tamanho médio dos osteomas excisados endoscopicamente e daqueles que foram removidos através de uma abordagem externa não diferiram estatisticamente, tanto para osteomas localizados no seio etmoidal (p = 0.2691) quanto para os localizados no seio frontal (p = 0.5891). Conclusão A escolha do método cirúrgico parece ser independente do tamanho do osteoma e a decisão provavelmente será tomada com base na experiência prévia do cirurgião, nos equipamentos disponíveis e conhecimento de diferentes técnicas cirúrgicas.

Pneumosinus Dilatans – A Rare Disorder Of Paranasal Sinuses

Pneumosinus dilatans is a very rare disorder of the paranasal sinuses, most commonly affecting the frontalsinuses (Pneumosinus dilatans frontalis). So far only 134 cases are reported in the literature. The exact etiologyof this disorder is unknown. The pathology causes abnormal dilatation of paranasal sinuses. Most patients areasymptomatic while others can have clinical features of frontal bossing, head ache, visual defects etc. Thediagnosis is by computed tomographic imaging. We here report a case of pneumosinus dilatans frontalis in a 22year old male patient presented with nasal obstruction.