Évaluation tomodensitométrique des variations anatomiques du toit de l'os ethmoïde chez l'adulte noir / Computed tomography evaluation of anatomical variations of the ethmoid bone roof in black adults

Etudier à la tomodensitométrie, les variations anatomiques du toit de l'os ethmoïde en déterminant la prévalence des variantes à haut risque. Matériels et méthodes: Etude transversale, avec une collecte rétrospective, descriptive et analytique menée sur une période de 06 mois dans deux services de radiologie et imagerie médicale à Lomé. Elle portait sur des examens de tomodensitométrie normaux des sinus de l'adulte. Résultats: L'âge moyen était de 50,69 ± 16,18 ans. La profondeur moyenne de la fosse olfactive dans le sexe masculin était de 4,03± 1,40 mm contre 4,45±1,59 mm dans le sexe féminin (p=0,0136). Le type III de Keros a été retrouvé dans 11 cas (3,5%). L'asymétrie de la profondeur de la fosse olfactive a été observée chez 107 (69%) patients. L'angle de Gera mesurait en moyenne 58,5±14,6 degrés et 60 (19,4%) toits de l'ethmoïde étaient classés dans le type III. On notait une asymétrie de l'angle de Gera chez 102 (65,8%) patients. La longueur moyenne de la lamelle latérale de la lame criblée était de 5,34 ± 1,4 mm. La longueur moyenne de la fovéa ethmoïdale chez les hommes était de 10 ± 2,5 mm contre 9,3 ± 2,2 chez les femmes (p=0,0078). Il existait une corrélation linéaire positive entre la profondeur de la fosse olfactive et l'angle de Gera (r=0,498; p=0,002). Conclusion: La fréquence élevée de l'asymétrie du toit ethmoïdal suggère que ces variations soient précisées par les radiologues dans les compte-rendu des examens de tomodensitométrie des sinus pour bilan préopératoire

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.

Relationship of the anterior ethmoid sinus to the lacrimal sac: a computed tomography study

Abstract Objective: To analyze the anatomical relationship between the lacrimal sac and the agger nasi cell on Computed Tomography (CT); to correlate the right and left sides on each scan. Methods: CT scans of adult patients were reviewed for pneumatization of the agger nasi and its relationship to the lacrimal sac. The degree of agreement between the right and left sides was also evaluated. Results: A total of 130 CT scans were examined. An agger nasi cell was found medial to the lacrimal sac in 59.23% of scans. On 86.15% of scans, pneumatization was similar on both sides. Conclusion: The agger nasi air cell is located medial to the lacrimal sac in more than half of individuals. The right and left sides exhibit the same pneumatization pattern in approximately 80% of cases. Level of evidence: 4.

Effectiveness of Functional Endoscopic Sinus Surgery in Surgical Management of Ethmoid Polyps

Background: Aim: To assess efficacy of functional endoscopic sinus surgery in surgical management of ethmoid polyps.Methods:One hundred twelve adult patients age ranged 18- 38 years of either gender with ethmoid polyps underwent FESS under general anesthesia. The extent of surgery was decided based on the findings in pre-operative CT scan of paranasal sinuses. Anterior ethmoidectomy, posterior ethmoidectomy, middle meatus antrostomy and clearance of frontal recess were performed in all the patients. Five functional criteria were evaluated as nasalobstruction , anosmia, rhinorrhea, post nasal drip, head ache and facial pain.Results:Pre- operative nasal obstruction percentage was 3.42 and post- operative ercentage was 2.10, Anosmia percentage was 2.14 and 1.15, Rhinorrhea percentage was 3.56 and 2.08 and ocular problem in 1 and synechia in 4 cases.Conclusions:Functional endoscopic sinus surgery found to be effective in management of ethmoid polyps and hence can be the treatment of choice

Is there a relationship between middle concha bullosa and ethmoid roof asymmetry? / Existe uma relação entre a concha média bolhosa e a assimetria do teto etmoidal?

Abstract Introduction The middle turbinate and ethmoid roof are intranasal structures and may have many anatomical variations. These structures, which serve as anatomical markers during functional sinus surgery, are important for preventing complications and performing a proper surgery. Knowledge of anatomical variations will increase surgical success and reduce complications. Objective We aimed to investigate the presence of asymmetry in the ethmoidal roof and anatomical variation in patients with and without concha bullosa. Methods In this study, the files of patients who underwent paranasal computed tomography between 2012 and 2018 were analyzed retrospectively. The patients were divided into two groups, as patients with and without concha bullosa. Differences between the two groups in terms of age, gender, septum deviation, ethmoid artery dehiscence, ethmoid roof asymmetry were examined. Results The 369 patients included in our study were divided into two groups; those with concha bullosa and those without concha bullosa. The mean age of the patients with concha bullosa was 36.1 ± 13.4 (min-max: 12-74) and the mean age of patients without concha bullosa was 37.5 ± 14.3 (min-max: 10-81). The ethmoid roof depths were compared between the two groups and a significant difference was observed (p < 0.001). The ethmoid roof depth was higher in the group with concha bullosa (p < 0.001). Conclusion The results of our study indicate that the ethmoidal roof tends to be higher in patients with middle concha bullosa.

Resumo Introdução A concha média e o teto etmoidal são estruturas intranasais e podem apresentar muitas variações anatômicas. Essas estruturas, usadas como marcadores anatômicos durante a cirurgia sinusal funcional, são importantes para evitar complicações e para a feitura adequada da cirurgia. O conhecimento das variações anatômicas aumenta o sucesso cirúrgico e reduz as complicações. Objetivo Investigar a presença de assimetria no teto etmoidal e variações anatômicas em pacientes com e sem concha bolhosa. Método Os prontuários dos pacientes submetidos à tomografia computadorizada de seios paranasais entre 2012 e 2018 foram analisados retrospectivamente. Os pacientes foram divididos em dois grupos, pacientes com e sem concha bolhosa. As diferenças entre os dois grupos em termos de idade, sexo, desvio do septo, deiscência da artéria etmoidal e assimetria do teto etmoidal foram avaliadas. Resultados Os 369 pacientes incluídos em nosso estudo foram divididos em dois grupos: com concha bolhosa e sem concha bolhosa. A média de idade dos pacientes com concha bolhosa foi de 36,1 ± 13,4 (mín-máx: 12-74 anos) e a média de idade dos pacientes sem concha bolhosa foi de 37,5 ± 14,3 (mín-máx: 10-81 anos). As profundidades do teto etmoidal foram comparadas entre os dois grupos, observou-se diferença significante (p < 0,001). Observou-se que a profundidade do teto etmoidal foi maior no grupo com concha bolhosa (p < 0,001). Conclusão O resultado do nosso estudo indica que pacientes com concha média bolhosa tendem a apresentar uma maior profundidade do teto etmoidal.

Huesos de la cabeza neumatizados. Enfoque unitario / Pneumatized Head Bones. Unitary Approach

Introducción: muchos huesos que forman el esqueleto de la cabeza humana y muchas especies de animales están neumatizados. Se han planteado múltiples hipótesis con diversos enfoques con la intención de explicar la existencia de estos espacios aéreos. De todos los huesos con estas características en humanos, solamente los senos paranasales y la neumatización del hueso temporal han sido objeto de múltiples hipótesis. La diversidad de criterios denota un desacuerdo, si no con todos, con la mayoría de ellos. Material y métodos: esta teoría se basa en reflexiones personales apoyadas en radiografías e imágenes anatómicas de los huesos frontal y temporal, con el objetivo de ilustrar y reforzar las razones de la existencia de estas cavidades en todas las especies que las poseen. Resultados, discusión y conclusiones: estos espacios de aire se forman en el cuerpo de los huesos cortos como un mecanismo de defensa natural al reemplazar el tejido esponjoso para prevenir infecciones graves del mismo (osteomielitis), que dada su proximidad al cerebro y sus estructuras representaría un peligro para la vida. Consideramos que los laberintos etmoidales fueron creados con el objetivo de llenar el espacio vacío entre los huesos vecinos y dar estabilidad al esqueleto óseo circundante. La neumatización del hueso temporal (hueso compacto) fue creada para "alojar y proteger" importantes estructuras de los sentidos del oído y del equilibrio, los vasos y los nervios.

Introduction: Many bones that make up the skeleton of the human head and many species of animals are pneumatized. Multiple hypotheses with various approaches have been stated with the intention of explaining the existence of these airspaces. Of all the bones with these characteristics in humans, only the paranasal sinuses and pneumatization of the temporal bone have been the subject of multiple hypotheses. The diversity of criteria denotes disagreement, if not with all, with the majority of them. Material and methods: This theory is based on personal reflections supported by x-rays and anatomical images of the frontal and temporal bones, with the aim of illustrating and reinforcing the reasons for the existence of these cavities in all species that possess them. Results, discussion and conclusions: These air spaces are formed in the body of short bones as a natural defense mechanism by replacing the spongy tissue to prevent serious infections of the same (osteomyelitis), which given its close proximity to the brain and its structures would represent a danger to life from its emergence. We consider that the ethmoid labyrinths were created with the aim of filling the empty space between the neighboring bones to give stability to the surrounding bone skeleton. The pneumatization of the temporal bone, compact bone, was created to "house and protect" important structures of the senses of hearing and balance, vessels and nerves

Proptosis in Otorhinolaryngology: An Overview

Abstract Introduction Ear, nose and throat (ENT)pathologies can present with proptosis as the early manifestation. The majority of ENT pathologies present with ocular manifestations, due to close anatomical relationship. Objective To study proptosis in ENT disorders in terms of etiology, pathogenesis, and management. Methods The present article is a prospective study conducted at a tertiary care center, in Telangana, India. Patients presenting with proptosis secondary to ENT disorders were thoroughly evaluated and subjected to surgical exploration after providing a signed informed consent. Results Sixty cases of proptosis secondary to ENT disorders have been reported. The most common cause was sinonasal squamous cell carcinoma followed by juvenile nasopharyngeal angiofibroma and allergic fungal rhinosinusitis. Conclusion Many ENT disorders can present with proptosis. Proptosis needs to be evaluated completely for proper management and to limit the morbidity associated with it.

Displasia fibrosa en seno etmoidal y esfenoidal: a propósito de un caso

Resumen La displasia fibrosa es una enfermedad del hueso, benigna, idiopática, de base genética y de progresión lenta, que se caracteriza por el reemplazo progresivo del hueso normal con tejido fibrótico, entremezclado con trabéculas óseas irregulares. El cráneo también es un sitio frecuente de afectación, los huesos del complejo craneofacial, incluida la mandíbula, el maxilar, la base y la bóveda craneal, son los principalmente afectados. Los huesos etmoidales, esfenoidales, frontales y temporales son afectados con poca frecuencia. En este artículo se presenta un caso de una paciente con cefalea y dolor en hemicara derecha, exoftalmos y edema periorbitario ipsilateral. Luego del examen físico, se realizó tomografía computarizada y biopsia del tumor, llegando al diagnóstico de displasia fibrosa de seno etmoidal y esfenoidal. Se maneja en forma conservadora, con seguimiento cada 6 meses para evaluar evolución. Es un caso con una localización infrecuente, y que debe ser cuidadosamente evaluado para adoptar la conducta terapéutica correcta.

Abstract Fibrous dysplasia is a slowly progressive, genetically based, benign, idiopathic bone disease characterized by progressive replacement of normal bone with fibrotic tissue, interspersed with irregular bone trabeculae. The skull is also a frequent site of involvement, the bones of the craniofacial complex, including the mandible, the maxilla, the base and the cranial vault, are mainly affected. The ethmoid, sphenoid, frontal, and temporal bones are affected at a low rate. This article presents a case of a patient with headache and pain in the right side, exophthalmos, and ipsilateral periorbital edema. After the physical examination, a computed tomography and biopsy of the tumor were performed, reaching the diagnosis of fibrous dysplasia of the ethmoid and sphenoid sinus. Conservative management is given, with follow-up every 6 months to assess evolution. It is a case with an infrequent location, and it must be carefully evaluated to take therapeutic behavior.

An Analysis of Configuration of Lateral Lamella of Cribriform Plate of Ethmoid: A Computed Tomographic Study.

Background: Ethmoid Skull Base (ESB) is anarticulation of ethmoid roof with Lateral Lamella ofCribriform plate (LLCP). An increased LLCP heightwas observed to increase the vulnerability of ESB tosurgical injuries. Aim and Objectives: The present studywas undertaken to analyze the configuration of thelateral lamella of cribriform plate, the ethmoid roof withrespect to Keros type of olfactory fossa. Material andMethods: Aretrospective Computed Tomographic (CT)study was done with 60 Coronal Paranasal Sinuses(PNS) scans and LLCP height was determined bysubtracting Medial Ethmoid Roof Point (MERP) fromCP heights and classified according to Keros. Thedifference between Medial Ethmoid Roof Point(MERP) and Lateral Ethmoid Roof Point (LERP)heights in both anterior and posterior planes indicatesthe direction of ethmoid roof slope. Results: Theaverage height of the LLCP was between 1.53 to 8.55mm with a mean (SD) of 3.77 mm 1.66 and majoritybelonged to Keros type I. Overall mean differencebetween LERP and MERP was 5.43 0.74 mm inanterior and 4.43 0.63 mm in posterior planes. In boththe planes irrespective of the sides the height of theLERPwas higher in relation to medial side. Conclusion:Keros type I was the most common type and the slope ofanterior ethmoid roof is steeper compared to posterior.This preoperative knowledge about the configuration ofLLCPas well as the ethmoid roof contour is vital duringendonasal ethmoidal surgeries.

Extramedullary plasmacytoma of the nasal cavity and ethmoidal sinus in human immunodeficiency virus-positive patient

Extramedullary plasmacytoma (EMP) occurring in the nose and paranasal sinus regions are rare with a male preponderance in the fifth and seventh decades of life. We report a case of EMP of the nasal cavity and ethmoid sinus in a 28-year-old female with human immunodeficiency virus infection

Complicación orbitaria recurrente por rinosinusitis. Reporte de un caso / Recurrent orbital complication by rhinosinusitis. A case report

El compromiso orbitario es la complicación más frecuente de la rinosinusitis aguda en pediatría, y el etmoides es el seno más afectado. La recurrencia es infrecuente. Existen solo tres casos publicados en la literatura. Una anomalía anatómica del proceso unciforme o un mucocele podrían ser factores predisponentes, que pueden obstruir el drenaje normal de los senos junto con la presencia de etmoiditis.La tomografía computada y la resonancia magnética orientan el diagnóstico. El tratamiento quirúrgico está indicado ante la falta de respuesta al tratamiento instaurado luego de 48 horas o disminución de la agudeza visual o recurrencias sin patología tumoral de base.Se presenta a un paciente de 4 años de edad que consultó por un cuadro compatible con etmoiditis complicada recurrente. Presentó celulitis preseptal en seis oportunidades y un episodio de absceso subperióstico, desde los 3 meses de edad. Evolucionó favorablemente luego de la operación quirúrgica.

Orbital infection is the most frequent complication of ethmoiditis. Recurrent periorbital cellulitis is a very rare complication of rhinosinusitis with only three reports in the literature describing this pathological process.This complication can be favored by an anatomical abnormality of the uncinate process or mucocele obstructing the normal drainage pathway, in addition to ethmoidal sinusitis.Computed tomography and magnetic resonance guide the diagnosis. The treatment is based on antibiotics, corticosteroids and local decongestants. Surgical treatment is indicated in the absence of response to treatment established after 48 hours or decrease in visual acuity or recurrent orbital complications without underlying tumor pathology. In this report, we present a case of orbital complication of rhinosinusitis in a 4 year-old-child with six episodes of unilateral periorbital cellulitis and one episode of subperiosteal orbital abscess since the age of 3 months. There was a complete resolution with no recurrence after the surgical intervention

Correlations between anatomical variations of the nasal cavity and ethmoidal sinuses on cone-beam computed tomography scans

PURPOSE: Anatomical variations of the external nasal wall are highly important, since they play a role in obstruction or drainage of the ostiomeatal complex and ventilation and can consequently elevate the risk of pathological sinus conditions. This study aimed to assess anatomical variations of the nasal cavity and ethmoidal sinuses and their correlations on cone-beam computed tomography (CBCT) scans. MATERIALS AND METHODS: This cross-sectional study evaluated CBCT scans of 250 patients, including 107 males and 143 females, to determine the prevalence of anatomical variations of the nasal cavity and ethmoidal sinuses. All images were taken using a New Tom 3G scanner. Data were analyzed using the chi-square test, Kruskal-Wallis test, and the Mann-Whitney test. RESULTS: The most common anatomical variations were found to be nasal septal deviation (90.4%), agger nasi air cell (53.6%), superior orbital cell (47.6%), pneumatized nasal septum (40%), and Onodi air cell (37.2%). Correlations were found between nasal septal deviation and the presence of a pneumatized nasal septum, nasal spur, and Haller cell. No significant associations were noted between the age or sex of patients and the presence of anatomical variations (P>0.05). CONCLUSION: Radiologists and surgeons must pay close attention to the anatomical variations of the sinonasal region in the preoperative assessment to prevent perioperative complications.

The use of bony septum as an extended spreader graft in primary and secondary rhinoplasty

@#<p><strong>OBJECTIVE:</strong>  To describe a surgical technique using bony septum, specifically vomer or perpendicular plate of the ethmoid (PPE), as an extended spreader graft (ESG) for securing septal extension graft (SEG) and for correcting internal nasal valve dysfunction.</p><p><strong>METHODS</strong>:</p><p>            <strong>Design:</strong>            Descriptive Case Series</p><p>            <strong>Setting:</strong>           Tertiary Private Hospital</p><p>            <strong>Participants:</strong> Thirty-two (32) patients who underwent aesthetic rhinoplasty from May 2016 to October 2017 were evaluated, and ten (10) patients presenting with symptomatic obstruction were considered for inclusion. The surgical technique was applied in patients with weak SEG for control of nasal length and tip projection who had inadequate septal cartilage for SEG and ESG intraoperatively. Results were evaluated grossly under direct vision intra-operatively and post-operatively to check the patency of the internal valve.</p><p><strong>RESULTS:</strong>  Bony septum was used as an ESG in five (5) patients (1 male, 4 females, ages 35 to 50-years-old) with inadequate septal cartilage. Intraoperative evaluation under direct vision showed anterior caudal septal deviation in all 5 patients in whom correction was confirmed after placement of SEG and ESG. Immediate post-operative evaluation confirmed bilaterally patent nasal valve in all 5, who reported subjectively improved breathing at 2 and 4 weeks post-operatively.  Post-operative photographs showed improvement of nasal length and tip.</p><p><strong>CONCLUSION:</strong> The use of the bony septum (vomer and PPE) as an ESG for primary or secondary rhinoplasty is a potentially effective means of supporting and securing the SEG for control of nasal length, preventing tip deviation or rotation and for improving internal valve function. Further trials are needed to establish its reliability and long-term effectivity.</p>

Quest for haller cells: A digital orthopantomography study

Aims: Haller Cells refer to the ethmoidal pneumatization and are the extensions of anterior ethmoid sinus into the floor of the orbit and superior aspect of the maxillary sinus, basically an anatomic variation. They may be associated with orofacial pain, sinusitis, nasal obstruction, impaired nasal breathing, headache, chronic cough, and mucocele. The aim of the present study was to identify, determine the prevalence and characteristics of Haller's cells on Digital orthopantomographs in patient's reporting to a dental institution in Chennai. Settings and Design: This was a retrospective, cross-sectional study. Subjects and Methods: The study group comprised 600 radiographs inclusive of both genders (379 females and 221 males) with an age range of 20–80 years. Retrospectively panoramic radiograph for each of the patients was viewed and interpreted for the presence of Haller's cells. The data collected was subjected to statistical analysis: frequencies/percentages, descriptive statistics to obtain the results. Statistical Analysis Used: Frequencies/percentages, descriptive statistics using SPSS for Windows Version 20 (SPSS Inc., Chicago, IL, USA), to obtain the results. Results: Haller's cells were noted in patients, accounting for a prevalence of 23.61%. The majority of the cells were circular, ovoid, and irregular in shape. Conclusions: This study has attempted to explore the characteristics of Haller's cells on panoramic radiographs. A description of Haller's cells on these radiographs may prove vital in enumerating the differential diagnosis for patients afflicted with intractable orofacial pain and reduce the risk of untoward intraoperative complications during endonasal procedures.

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.

Prevalence of supraorbital ethmoid air cells among Filipinos

Objective@#This study aims to determine the prevalence of supraorbital ethmoidal cells (SOEC) among Filipinos in a single tertiary government institution. @*Methods@#Study Design: Retrospective review of CT scan images. Setting: Single Tertiary Institution. Patients: 123 patients aged 13-years-old and above.@*Results@#A total of 474 CT scans (60 PNS and 414 Craniofacial) performed during the study period were considered, with 55 excluded for age < 13, and 296 excluded for craniofacial fractures. None had congenital craniofacial deformities. Eighty-five of 123 CT scans (69.11%) or 147 of 246 sides (59.76%) demonstrated supraorbital ethmoidal cells. There were 62 (72.94%) males and 23 (27.06%) females, ages ranging from 13 to 83 (mean age between male and female was 39.53 and 43.57). The scans showed 62 (50.41%) patients with bilateral and 23 (18.70%) with unilateral SOEC. Twenty-two (25.9%) patients were identified with chronic rhinosinusitis and two of whom were considered to have maxillary sinus mass. Two out of 5 patients with SOEC presented with aplastic/hypoplastic frontal sinus.@*Conclusion@#Our study suggests that Filipinos may have a higher prevalence rate of SOEC than their Chinese, Japanese and Korean counterparts and bilateral SOEC are more predominant than unilateral SOEC.

CT observation of retromaxillary posterior ethmoid / 临床耳鼻咽喉头颈外科杂志

To investigate the morphologic characteristics of the retromaxillary posterior ethmoid.A total of 103 outpatients encountered in our hospital during March 2012 and December 2012,who completed paranasal sinus CT examination,were included in this study.Patients had no sinus trauma,surgery or tumor history.Their paranasal sinus CT scans were analyzed from scheduled axial and coronal plane.The incidence and imaging features of the retromaxillary posterior ethmoid were observed.The retromaxillary posterior ethmoid(RMPE)was the posterior ethmoid cell that expanded along the lamina papyracea toward the infraorbital region.RMPE was located behind the posterior wall of the maxillary sinus and under the orbital floor.The occurrence rate of the RMPE was 74.3%.The ethmomaxillary septum is the bony septum the between the maxillary sinus and posterior ethmoid.Anatomical confirmation of RMPE is based mainly on the presence of the ethmomaxillary septum.RMPE is located at the back of ethmomaxillary septum.The sagittal angulation of the ethmomaxillary septum ranged from 22 to 87 degrees,with an average of(50.34±12.10)degrees.The ethmomaxillary septum is important for anatomic recognition of the RMPE.Accurate identification of the RMPE before ESS can help improve the removal of the posterior ethmoid sinus.

A Case of Frontoethmoidal Mucopyocele Combined with Cerebrospinal Fluid Leak and Complicated Tension Pneumocephalus after Marsupialization

After the trauma of frontoethmoidal sinus, post-traumatic mucocele may occur. Surgical removal of the lesions rarely produces cerebrospinal fluid (CSF) leakage and even delayed tension pneumocephalus. We experienced a case of fronto-ethmoid mucocele complicated with peri-operative CSF leakage and post-operative tension pneumocephalus which was improved by conservative treatment. It is imperative to take into account the potential for tension pneumocephalus when a patient suffers from severe headache after sinus surgery.

Three-dimensional anatomical analysis of the perpendicular plate of ethmoid among Chinese and its safety harvesting range in rhinoplasty / 中华整形外科杂志

Objective@#To investigate the morphology and structure of the perpendicular plate of ethmoid and measure its anatomical parameters among Chinese population. To discuss the safety range of harvesting perpendicular plate of ethmoid in rhinoplasty.@*Methods@#Sixty-four healthy Chinese were included in accordance with certain requirements and their paranasal sinus was examined using 64 slices computed tomography (CT). The three-dimensional (3D) structure of their perpendicular plate of ethmoid was reconstructed, and the area, length, height and thickness were measured by Mimics 17.0 software. Statistical analysis was completed by SPSS 22.0 software and was checked out by t-test.@*Results@#According to the result from 3D anatomical analysis, the length of the anterior border of perpendicular plate of ethmoid was (28.58±2.91) mm, the inferior border was (26.17±5.76) mm and the posterior border was (19.84±3.17) mm. The thickness of the anterior border three sections were (3.07±0.72) mm, (3.09±0.73) mm and (1.75±0.55) mm respectively. The thickness of the inferior border in three sections were (1.96±0.62) mm, (1.94±0.73) mm and (1.87±0.67) mm, respectively. The length of the middle and lower third of the perpendicular plate of ethmoid anterior border was (10.04±2.39) mm. As to the superior border, the length was (35.31±6.52) mm. The total area of the perpendicular plate of ethmoid was (1 057.85±184.38) mm2, the lower section area was (474.09±109.60) mm2, and the ratio of middle and lower third to the total area was 0.45±0.07.@*Conclusions@#The thickness of the lower 1/3 segment of the vertical plate of the ethmoid bone is thinner than that of the upper segment, and it is far away from the skull base, which is easily to harvest and meet the application in surgery.