Presencia de lesiones quísticas en sacos pericoronarios de terceros molares mandibulares / Presence of cystic lesions in pericoronary sacs of mandibular third molars

Introducción: a pesar de que un tercer molar no erupcionado repre- senta un riesgo de formación quística, la práctica clínica desestima el análisis histopatológico de los folículos de dichos molares. Objetivo: identificar la frecuencia de lesiones quísticas en los sacos pericoronarios de terceros molares mandibulares. Material y métodos: estudio des- criptivo, transversal, analítico y observacional, en donde se incluyeron sacos pericoronarios de terceros molares mandibulares para su análisis histopatológico, descripción de características clínico-radiográficas y su asociación con la presencia de cambios histológicos o lesiones quís- ticas. Resultados: se incluyeron 48 muestras de sacos pericoronarios, la histopatología de los sacos pericoronarios mostró que 83.3% tenían algún tipo de alteración: 13 quistes paradentales (27.1%), cuatro quistes dentígeros (8.3%), 12 folículos hiperplásicos (25.0%) y 11 folículos inflamados (22.9%). La presencia de lesiones quísticas en la población fue de 35.4%. Se detectó asociación estadísticamente significativa entre el sexo y la presencia de lesiones quísticas (p = 0.039) y entre el nivel de erupción y la presencia de cambios histológicos (p = 0.046). Con- clusiones: la frecuencia de lesiones quísticas o cambios histológicos en folículos de terceros molares mandibulares es alta, principalmente en molares parcialmente erupcionados o submucosos y sin importar la ausencia de sintomatología o alteraciones radiográficas (AU))

Introduction: although a non-erupted third molar represents a risk of cystic formation; clinical practice rejects the histopathological analysis of the follicles of said molars. Objective: identify the frequency of the histopathological changes in pericoronary sacs of mandibular third molars. Material and methods: descriptive cross- sectional, observational and analytic study, where pericoronary sacs of mandibular third molars were included for histopathological analysis, description of clinical-radiographic characteristics and their association with the presence of histological changes or cystic lesions. Results: 48 samples of pericoronary sacs were included, the histopathology of the pericoronary sacs showed 83.3% had some type of alteration: 13 paradental cysts (27.1%), four dentigerous cysts (8.3%), 12 hyperplastic follicles (25.0%) and 11 inflamed follicles (22.9%). The presence of cystic lesions in the population was 35.4%. A statistically significant association was detected between sex and the presence of cystic lesions (p = 0.039); and between the level of eruption and the presence of histological changes (p = 0.046). Conclusions: the frequency of cystic lesions or histological changes in mandibular third molar follicles is high, mainly in partially erupted or submucosal molars and regardless of the absence of symptoms or radiographic alterations (AU)

Cistos e tumores odontogênicos: estudo retrospectivo dos casos diagnosticados no período de 10 anos em um hospital no sul do Brasil / Odontogenic cysts and tumors: a retrospective study of the cases diagnosed in a period of 10 years in a southern Brazilian hospital

Introdução: as lesões odontogênicas (LOs) compreendem um grupo heterogêneo de patologias orais e maxilofaciais que apresentam características distintas. O objetivo do presente estudo foi identificar as características clínico--patológicas das LOs diagnosticadas em um hospital da região sul do Brasil. Materiais e métodos: foi realizado um estudo retrospectivo para levantamento dos casos com diagnóstico histopatológico de LOs no período entre 2007 e 2017. Os laudos dos pacientes foram avaliados para extração das características clínico-patológicas e dos diagnósticos histopatológicos de cada caso. Resultados: um total de 255 casos de LOs foram identificados. Destes casos, 197 (77%) cistos odontogênicos e 58 (23%) tumores odontogênicos foram coletados, sendo que somente um caso (0,39%) possuiu o diagnóstico de neoplasia odonto-gênica maligna. Os diagnósticos mais prevalentes foram cisto radicular (32,5%) e cisto dentígero (31,76%), seguidos de ceratocisto odontogênico (10,98%), odontoma (10%) e ameloblastoma (10%). A maioria dos casos acometeu mandíbula (53,7%), com uma discreta predileção pelo sexo feminino (51%). A média de idade foi de 34±20,53 anos. Discussão: os dados apresentados corroboram com a literatura no que se refere à raridade do diagnóstico de tumores odontogênicos. Conclusão: o presente estudo demonstrou as principais características clínico-pato-lógicas de LOs diagnosticadas em um hospital no sul do Brasil, contribuindo para um maior conhecimento do perfil destas lesões.

Introduction: odontogenic lesions (OLs) represent a heterogeneous group of oral and maxillofacial patho-logies presenting distinct characteristics. The present study aimed to identify the clinical and pathological characteristics of OLs diagnosed in a southern Brazilian hospital. Materials and methods: a retrospective study was performed to evaluate cases with histopathological diagnosis of OLs identified in the period between 2007 and 2017. The patient's medical records were evaluated in order to obtain the clinical and pathological charac-teristics and the histopathological diagnosis from each case. Results: a total of 255 cases of OLs were identified. From these, 197 (77%) odontogenic cysts and 58 (23%) odontogenic tumors were surveyed, with only one case (0,39%) of a malignant odontogenic neoplasm. The most prevalent diagnosis were radicular cyst (32.5%) and den-tigerous cyst (31.76%), followed by odontogenic keratocyst (10.98%), odontoma (10%) and ameloblastoma (10%). The majority of the cases affected the mandible (53.7%) with a slight preference by female individuals (51%). The mean age was 34±20.53 years old. Discussion: the presented data are in accordance with the literature regarding the rarity of the diagnosis of odontogenic tumors.Conclusion: the present study demonstrated the main clinical and pathological characteristics of OLs diagnosed in a southern Brazilian hospital, contrib-uting to a better understanding of these injuries profiles.

Inflammatory and developmental odontogenic cysts: 23-year observational and retrospective study / Cistos odontogênicos inflamatórios e de desenvolvimento: estudo observacional e retrospectivo de 23 anos

Objective: This observational and retrospective study evaluated the prevalence and characteristics of odontogenic cysts, outlining the epidemiological profile of these lesions. Material and methods: The following data were collected from the medical records of patients with a diagnosis confirmed by microscopy: age, sex, ethnicity, anatomical location, histopathological diagnosis and treatment, between 1995 and 2018. Results: Of the 70 cysts, 75.7% were inflammatory and 24.2% development. The inflammatory periapical cyst was the most prevalent (62.8%) followed by the dentigerous cyst (71.0%). The lateral radicular cysts and odontogenic keratocysts obtained the same percentage (5.7%), followed by the residual cyst (4.3%), paradental (2.8%) and the orthokeratinized variable (1.5%). Women were slightly more affected (1.12: 1) with greater involvement of leucodermas (80%). Age and anatomical location differed according to each lesion, although the anterior maxilla region was more affected. Enucleation was the most used treatment (75.7%), except for odontogenic keratocysts, in which marsupialization was performed in 75% of the cases. Conclusion: Epidemiological data provide an important insight into the prevalence, extent and severity of these lesions, allowing early diagnosis and prevention, in order to guarantee the reduction of cases and improve the quality of life of the population.

Objetivo: Avaliar a prevalência e características dos cistos odontogênicos de forma observacional e retrospectiva, delineando o perfil epidemiológico destas lesões. Material e Métodos: Foram coletados os seguintes dados dos prontuários de pacientes com diagnóstico confirmado microscopicamente: idade, sexo, etnia, localização anatômica, diagnóstico histopatológico e tratamento, entre os anos de 1995 a 2018. Resultados: Dos 70 cistos, 75,7% eram inflamatórios e 24,2% de desenvolvimento. O cisto periapical inflamatório foi o mais prevalente (62,8%) seguido pelo cisto dentígero (71,0%). O cisto radicular lateral e queratocisto odontogênico obtiveram o mesmo percentual (5,7%), seguidos do cisto residual (4,3%), paradentário (2,8%) e a variável ortoqueratinizada (1,5%). As mulheres foram ligeiramente mais afetadas (1,12:1) com maior acometimento de leucodermas (80%). Idade e localização anatômica diferiram de acordo com cada lesão, embora a região anterior de maxila tenha sido mais afetada. A enucleação foi o tratamento mais utilizado (75,7%), exceto para o queratocisto odontogênico, no qual a marsupialização foi realizada em 75% dos casos. Conclusão: Os dados epidemiológicos fornecem uma visão importante para o entendimento da prevalência, extensão e gravidade dessas lesões, viabilizando o diagnóstico precoce e medidas preventivas, a fim de garantir a redução dos casos e melhorar a qualidade de vida da população.

Prevalencia de carcinoma intraóseo primario derivado de quiste dentígero / Prevalence of primary intraosseous carcinoma derived from a dentigerous cyst

RESUMEN Introducción: La malignización de quiste dentígero a carcinoma intraóseo primario es infrecuente, poco documentada en la literatura. Corresponde del el 1 por ciento al 2,5 por ciento del total de tumores odontogénicos y es exclusiva de los huesos maxilares. Más común en hombres sobre 50 años de edad. Las características clínicas se asocian a edema, movilidad de piezas dentarias, parestesia, y la mayoría ocurre en ausencia de dolor, características que hacen difícil su diagnóstico y presentan un desafío para los patólogos. Objetivo: Revisar la prevalencia de carcinoma intraóseo primario derivados de quiste dentígero en los últimos 15 años publicados en PubMed Métodos: Se realizó una revisión de la literatura en un periodo que considera los últimos 15 años. Se consultó la base de datos PubMed utilizando los términos: "dentigerous cyst prevalence", "primary intraosseous squamous cell carcinoma", "dentigerous primary intraosseous squamous cell carcinoma". Se incluyeron artículos en inglés y español. De los 217 artículos, se suscribió a 39 para hacer el cruce de datos. Análisis e integración de los resultados: Para reconocer una enfermedad tan agresiva como el carcinoma intraóseo primario derivado de quiste dentígero hay que estudiar sus características clínicas, radiográficas y sintomatología. Su íntima relación con el quiste dentígero, el cual es el más prevalente de los quistes del desarrollo hace fundamental el profundo conocimiento de ambos. El carcinoma intraóseo primario se presenta como un desafío para los clínicos por su baja sintomatología y pobre sobrevida, con un total de 44 823 quistes odontogénicos estudiados, 9806 se diagnosticaron como quistes dentígeros, y 22 se malignizaron a carcinoma intraóseo primario, para un 0,32 por ciento del total. Conclusiones: La malignización de quiste dentígero a carcinoma intraóseo primario tiene una baja incidencia, pero se presenta silente haciendo difícil su diagnóstico precoz. Se recomienda biopsia de protocolo para cada caso de quiste dentígero y así evitar la baja sobrevida que produce el carcinoma intraóseo primario(AU)

ABSTRACT Introduction: Malignancy of dentigerous cyst into primary intraosseous carcinoma is infrequent and scantily documented in the literature. It represents 1 percent to 2.5 percent of the total odontogenic tumors and is exclusive of maxillary bones. It is more common among men aged around 50 years. Its clinical characteristics are edema, tooth mobility and paresthesia, and in most cases an absence of pain. These features hamper its diagnosis and pose a challenge to pathologists. Objective: Review the prevalence of primary intraosseous carcinoma derived from dentigerous cysts as published in PubMed in the last 15 years. Methods: A literature review was conducted of papers published in the last 15 years. The database PubMed was consulted using the following search terms: "dentigerous cyst prevalence", "primary intraosseous squamous cell carcinoma", "dentigerous primary intraosseous squamous cell carcinoma". The papers included were in English or Spanish. Of the 217 papers obtained, 39 were selected for data crossing. Data analysis and integration: Recognition of a condition as aggressive as primary intraosseous carcinoma derived from a dentigerous cyst requires examination of its clinical and radiographic characteristics as well as its symptoms. Its close relationship to dentigerous cyst, the most prevalent of developmental cysts, makes it necessary to gain an accurate and deep understanding of both. Primary intraosseous carcinoma poses a challenge to clinicians due to its low symptomatology and poor survival. Of the total 44 823 odontogenic cysts studied, 9 806 were diagnosed as dentigerous cysts and 22 maligned into primary intraosseous carcinoma, for 0.32 percent of the total. Conclusions: Malignation of a dentigerous cyst into primary intraosseous carcinoma has a low incidence and a silent presentation, which hampers its early diagnosis. Protocol biopsy is recommended for each case of dentigerous cyst to prevent the poor survival caused by primary intraosseous carcinoma(AU)

Tumor odontogênico ceratocístico: levantamento de casos e revisão de literatura / Keratocystic odontogenic tumor: survey of cases and literature review

Introdução: O Tumor Odontogênico Ceratocístico (TOC) pode ser definido como um tumor intraósseo, benigno, de origem odontogênica. A incidência dessa lesão na mandibula é de 3 a 4 vezes maior que na maxila, com preferência pela região dos terceiros molares inferiores, no ângulo da madíbula, de onde se estende para o ramo ascentende. Em casos de lesões mais extensas, observa-se tumefação, drenagem ou dor associada, aumento de volume de tecidos moles e tecido ósseo, parestesia, mobilidade de dentes envolvidos pela lesão, bem como crescimento lento e deslocamento de peças dentárias. Objetivo e Metodologia: O objetivo deste trabalho foi realizar uma revisão da literatura e um levantamento de casos diagnosticados no Laboratóro de Patologia do Instituto de Ciências Biológicas da UPF a respeito do TOC. Resultados: No presente levantamento, foram encontrados 48 casos de TOC, com uma prevalencia do gênero feminino, na segunda e terceira década de vida. Um maior número de casos ocorreram na mandibula com preferencia pela região de terceiro molar inferior. Apresentavam em sua maioria lesões radiolúcidas uniloculares e o principal sinal clínico foi o de abaulamento. Conclusão: O que pode-se concluir através deste trabalho é que é fundamental para o sucesso do tratamento do Tumor Odontogênico Ceratocístico, o conhecimento por parte do Cirurgião Dentista de lesões tumorais de origem odontogênica , para que um correto e precoce diagnóstico seja executado, levando a melhor escolha do tratamento e, consequentemente um prognóstico favorável.

Introduction: The Keratocystic odontogenic tumor can be defined like an intraosseous tumor, benign, of odontogenic origin. The incidence of this lesion in the mandible and 3 to 4 times higher than in the maxilla, with a preference for the third molar region. In cases of more extensive lesions, there is swelling, drainage or pain associated, swelling of soft tissue and bone tissue, paresthesia, mobility of teeth involved by the injury, as well as slow growth and displacement of dental pieces. Objective and Methodology: The objective of this study was a literature review and a survey of cases diagnosed in the Pathology Lab of the Institute of Biological Sciences, UPF, about keratocystic odontogenic tumor. Result: In this survey, we found 48 cases of TOC, with a prevalence of females in second and third decade of life. A greater number of cases occurred in the jaw with a preference for the third molar region. Had mostly unilocular radiolucent lesions and was the main clinical sign of bulging. Conclusion: What can be concluded from this work is that it is essential for the successful treatment of odontogenic tumor keratocystic, knowledge by the Surgeon Dentist of odontogenic origin tumors, for a correct and early diagnosis is performed, taking the best choice of treatment and thus a favorable prognosis.

Analysis of 153 cases of odontogenic cysts in a South Indian sample population: a retrospective study over a decade

The purpose of this study was to determine the prevalence of odontogenic cysts and to identify their clinico-pathological features among patients by studying biopsy specimens obtained from the archives of the Department of Oral and Maxillofacial Pathology, College of Dental Sciences, Davangere, Karnataka, India, during the past 10 years. Data for the study were retrieved from the case records of patients fitting the histological classification of the World Health Organization (1992). Analyzed clinical variables included age, gender, anatomical location, and histological diagnosis. Of the 2275 biopsy reports analyzed, 194 cases (8.5%) were jaw cysts, including odontogenic (6.7%) and nonodontogenic cysts (0.25%). Odontogenic cysts included 69.3% radicular, 20.3% dentigerous, 5.2% keratinizing odontogenic, 3.3% residual, and 1.9% other cysts, such as lateral periodontal, botryoid odontogenic, and gingival cysts. The most frequent clinical manifestation was swelling, followed by a combination of pain and swelling. Age, gender, and location were related to the etiopathologic characteristics of the cyst type. A definitive diagnosis can be made on the basis of clinical, radiological, and histological findings, which makes a good interdepartmental relationship between the clinicians and pathologists essential. Knowledge of the biological and histological behavior of the odontogenic cysts is required for their early detection and treatment.

Quistes y tumores odontogénicos: revisión de 150 casos / Odontogenic cysts and tumors: a review of 150 cases

En el año 2005 la OMS realizó algunas modificaciones en la clasificación de quistes y tumores odontogénicos, por lo cual realizamos una revisión de los últimos 150 casos de quistes y tumores odontogénicos evaluados y operados en el Servicio de Odontología y Cirugía Bucomaxilofacial, cuyos diagnósticos histopatológicos fueron realizados en el Servidio de Anatomía Patológica de nuestro hospital, previo a mayo de 2005. Las muestras fueron nuevamente clasificadas, según las modificaciones impartidas por la OMS y se observaron las modificaciones estadísticas que de ello resultaron

Tumor odontogénico queratoquístico: presentación de un caso clínico y revisión de la bibliografía / Keratocystic odontogenic tumor: report of a clinical case and review of the literature

El tumor odontogénico queratoquístico (TOK) es una entidad patológica benigna de origen odontogénico con tendencia a la recidiva y controversial tratamiento. Cerca del 75 por ciento se presentan en zona de rama ascendente y cuerpo mandibular, mientras que en zona sinfisaria no alcanzan el 10 por ciento de los casos. Se presenta un caso clínico en zona sinfisaria con diagnóstico de TOQ. Se realiza el tratamiento y seguimiento a distancia, revisando las características clínicas y anatomopatológicas de la entidad.

Odontogenic keratocystic tumor: a clinical and histopathologic retrospective study based on the New WHO classification / Tumor odontogénico queratoquístico: estudio clínico e histopatológico retrospectivo basado en la nueva clasificación de la OMS

The aim was to review previous cases of Odontogenic Keratocyst or Keratocystic Odontogenic Tumor according to the new WHO classification. We used all cases diagnosed as Odontogenic Keratocyst or Keratocystic Odontogenic Tumor registered in the archives of the Pathologic Anatomy Laboratory of the Department of Pathology and Oral Diagnosis of the School of Dentistry of the Federal University of Rio de Janeiro, Rio de Janeiro, Brazil, which were collected from September, 1983 until September, 2008. The terms “Keratocyst” or “Keratocystic Odontogenic Tumor” were searched for and the following data were collected from the case files: age, sex, location of the lesion(s), and patients’ chief complaints. Hematoxilin and Eosin slides were reviewed according to the 2005 WHO criteria. The results found are in accordance with the literature. Due to its benign features, the Orthokeratinized Odontogenic Keratocyst found in our sample had its diagnosis changed to Orthokeratinized Odontogenic Cyst, as recommended by the WHO. Histopathologic exams are required for every bone lesion, in order to establish correct diagnosis. Because of its features, the Keratocystic Odontogenic Tumor must have more aggressive treatment, compared with odontogenic cysts, and long-term follow-up is mandatory.

El objetivo fue revisar los casos anteriores de queratoquiste odontogénico (QO) o tumor odontogénico queratoquístico (TOQ) de acuerdo con la nueva clasificación de la OMS. Fueron utilizados todos los casos diagnosticados como QO o TOQ registrados en los archivos del Laboratorio de Anatomía Patológica del Departamento de Patología y Diagnóstico Oral de la Facultad de Odontología de la Universidad Federal de Río de Janeiro, Rio de Janeiro, Brasil, registrados a partir de septiembre de 1983 hasta septiembre del 2008. Los términos "Queratoquiste" o "tumor queratoquistes odontogénicos" se buscaron y los siguientes datos se obtuvieron de los archivos del caso: edad, sexo, localización de la lesión (es), y quejas de los pacientes. Las muestras histológicas de hematoxilina y eosina fueron revisadas de acuerdo a los criterios de la OMS 2005. Los resultados encontrados estaban de acuerdo con la literatura. Debido a sus características benignas, el queratoquiste odontogénico ortoqueratinizado encontrado en nuestra muestra había cambiado su diagnóstico de quiste odontogénico ortoqueratinizado, según lo recomendado por la OMS. Los exámenes histopatológicos son necesarios para toda lesión ósea, con el fin de establecer el diagnóstico correcto. Debido a sus características, el TOQ debe tener un tratamiento más agresivo, en comparación con los quistes odontogénicos, donde un seguimiento a mediano y largo plazo es obligatorio.

Carcinoma odontogénico de células claras / Odontogenic carcinoma of clear cells

El carcinoma odontogénico de células claras es un raro tumor odontogénico que se presenta principalmente en la parte anterior de la mandíbula, mayormente en mujeres entre la quinta y séptima década de vida. Se caracteriza histológicamente por redes de células con citoplasma claro mezcladas con células que contienen citoplasma eosinófilo. Es sumamente agresivo y puede presentar metástasis local o a distancia. Al emplearse el tratamiento por enucleación y curetaje, frecuentemente da lugar a recurrencia, por lo que se aconseja el tratamiento radical de resección mandibular hasta una zona libre de lesión. El carcinoma odontogénico de células claras debe ser considerado en el diagnóstico diferencial de tumores mandibulares que presenten células claras para el establecimiento del plan de tratamiento adecuado. Se debe incluir el seguimiento a largo plazo del paciente. Se presenta el caso de un paciente femenino de 69 años de edad, con una lesión presente en la región presinfisaria derecha, sin afectación de ganglios linfáticos regionales o metástasis aparente. Se efectuó osteotomía segmentaria mandibular y reconstrucción con placa de titanio(AU)

Clear cell odontogenic carcinoma is a rare malignant odontogenic neoplasm, with a predilection for the anterior segment of the jaws, and presenting basically in women between the fifth and seventh decades of life. CCOC is composed histopathologycally by strands or groups of cells showing clear cytoplasm associated with cells showing eosinophilic cytoplasm and some times with tall columnar cells that resambled ameloblasts. CCOC is considered a low-grade malignancy but in some cases its behavior is aggressive giving local and distant metastasis, so the recommended treatment is a radical resection and follows the patient very close. CCOC should be diferenciated microscopically from other local and metastatic lesions that are composed with clear cells also, in order to render a proper diagnosis and treatment. We are presenting a clinical case corresponding to a 69 years old female patient, with a 10 year history of a slow growing anterior mandibular lesion without lymph node or distant metastasis, with a biopsy diagnosis of clear cell odontogenic carcinoma, the patient was treated by partial resection of the anterior mandible and reconstructed with a titanium plate(AU)

[ clinicopathologic study of odontogenic cysts and tumors in an Iranian sample population]

Odontogenic cysts and tumors are lesions that are found exclusively in the mandible and maxilla. These lesions are one of the main causes of jaw destruction. But unfortunately only a few studies have been conducted in Iran on relative frequency of these lesions. The aim of this study was to determine the relative prevalence of odontogenic cysts and tumors in Kerman province along with age, sex and site of presentation over a 12-year period and to compare it with previous reports from different parts of the world. This research reviewed 1320 biopsies in a 10-years period. Data on factors such as age, sex and location of the lesions were extracted from pathology reports and analyzed by SPSS statistical software. Of 1320 specimens, 221 were diagnosed as odontogenic cysts and 25 biopsies were diagnosed as odontogenic tumors. Odontogenic cysts and tumors occurred most frequently in the first to second decades of life and most commonly in the mandible. Cysts were more common in men than women. Radicular cysts were the most common one [33.9%], followed by dentigerous cysts [21.7%] and odontogenic keratocyst [15.4%]. The most prevalent odontogenic tumor was ameloblastoma [41.4%], Our study provides demographic data on odontogenic cysts and tumors in Kerman province. Odontogenic cysts have a predilection for certain ages, sexes and sites. To determine the real relative frequency of odontogenic tumors, further studies should be conducted, especially in Iran, by experienced pathologists in the field of odontogenic tumors

Prevalência de cistos e tumores odontogênicos em pacientes atendidos na Fundação Assistencial da Paraíba: estudo retrospectivo / Prevalence of odontogenic cysts and tumors in patients treated at the Paraíba Health Assistance Foundation: a retrospective study

Avaliar a prevalência de cistos e tumores odontogênicos em pacientes atendidos na Fundação Assistencial da Paraíba (FAP). Foi realizado um estudo observacional, epidemiológico e retrospectivo, por meio da análise de 2.268 prontuários odontológicos de pacientes atendidos no período de janeiro de 1999 a dezembro de 2008. Os dados foram coletados por um único examinador e registrados em ficha específica, sendo analisadas as variáveis: gênero, faixa etária, tipo de lesão (cisto ou tumor) e localização (maxila ou mandíbula). A análise bivariada utilizou o teste do Qui-quadrado, sendo empregado um nível de significância de 5%. A prevalência de cistos e tumores foi de 1,9%, sendo verificada maior ocorrência no gênero feminino(62,8%) e na faixa etária de indivíduos acima de 51 anos (25,6%). A maxila foi a região mais atingida (60,5%). Não se observou diferença estatisticamente significante entre o gênero e o tipo de lesão (P=0,249) e entre a região envolvida e o tipo de lesão (p=0,190). Os cistos radiculares apicais foram os mais frequentes (51,7%), seguido dos cistos dentígeros (20,7%). Quanto à distribuição segundo o gênero, entre os homens houve predomínio do cisto dentígero, enquanto entre as mulheres a maior frequência foi de cisto radicular apical. Em relação aos tipos de tumores, os ameloblastomas (35,8%) e os odontomas (35,8%) foram os mais frequentes e as mulheres foram mais afetadas que os homens (78,6% versus 21,4%). Concluiu-se ser baixa a prevalência de cistos e tumores odontogênicos, sendo observada maior ocorrência no gênero feminino, em indivíduos acima de 51 anos e na região da maxila.

Queratoquiste odontogénico / Odontogenic keratocyst

El queratoquiste odontogénico constituye un tipo histológico de los quistes odontogénicos del desarrollo cuya mayor incidencia ocurre entre la segunda y tercera décadas de la vida, y puede tener un segundo momento de frecuente aparición hacia la quinta década. Las zonas del tercer molar inferior y el àngulo mandibular son las mayormente afectadas, desde donde la lesión progresa hacia la rama y el cuerpo. Entre los otros quistes odontogénicos este presenta gran importancia debido a la alta tasa de recurrencia ubicada entre el 25 y 60 por ciento además de presentar características histopatológicas que lo diferencian de otras lesiones quísticas. Se reporta un caso en un paciente de sexo femenino, de 33 años de edad, que al examen clínico y radiogràfico, presentó una lesión circunscrita al cuerpo de la mandíbula del lado izquierdo, en el àrea de brote del segundo premolar, radiolucida unilocular. Después de los exàmenes clínicos, radiogràficos e histopatológicos se diagnosticó: queratoquiste odontogénico. Se realizó tratamiento quirúrgico con resultados satisfactorios y sin señales clínicas ni radiogràficas de recidiva hasta el momento, el defecto óseo fue reconstruido con Hidroxiapatita HAP-200 sin reacción adversa al implante(AU)

Odontogenesis keratocyst is a histological type of developmental odontogenic cysts whose incidence occurring between the second and the third decades of life with a potential second appearance in fifth decade. The lower third molars and the mandibular angle areas are the more involved and from there the lesion progresses to branch and body. Among the other types of cysts this is very important due to the high rate of relapse located between the 25 and the 60 percent and by its histopathologic features differentiating it from other cystic lesions. The case of a female aged 33 is presented, which in clinical and radiographic examination had a lesion circumscribed to radiolucent unilocular left mandibular area in the second premolar eruption. After clinical radiographic and histopathologic examinations an odontogenic keratocyst was diagnosed. Surgical treatment was applied with satisfactory results and until now without clinical and radiographic relapse signals(AU)

Queratoquistes múltiples asociados a síndromes: revisión de la literatura, reporte de tres casos clínicos / Syndrome-associated multiple keratocysts: a review of the literature and report of three clinical cases

El queratoquiste odontogénico constituye una entidad definida, con características histológicas y conducta biológica específica que permiten distinguirlos de otros quistesodontógenos productores de queratina. Se presentan en forma única o múltiple, la forma de presentación múltiple constituye uno de los criteriosmayores que obliga a la búsqueda deotras alteraciones asociadas que dan lugar a diferentes síndromes, siendo el más frecuente el Síndrome de Gorlin- Goltz´s. Se presentan tres casos de queratoquistes múltiples, describiendosus aspectos clínicos, radiográficos ehistopatológicos, realizando una breve revisión.

The Prevalence of Inflammatory and Developmental Odontogenic Cysts in a Libyan Population

Objective- The aim of this study was to determine the prevalence of odontogenic jaw cysts in a Libyan population and to compare the data with previously published reports from other countries. Materials and methods- We retrieved and analyzed 2190 case notes and biopsy records of the Department of Oral and Maxillofacial Surgery and the Department of Oral Pathology and Microbiology; Al Arab Medical Sciences University; Benghazi; Libya; dating from January 1990 to December 2005. There were 326 cases (14.8) of diagnosed odontogenic cysts among the 2190 biopsies performed during this period. The cases were analyzed for age and sex distribution; site of presentation; association with impacted teeth; and the method of treatment. Results- The male to female ratio of patients was 1.3:1 Radicular cysts accounted for 222 cases (68.1); followed by dentigerous cysts (n=49; 15) and odontogenic keratocysts (n=43; 14.1). Mean ages of the patients were; respectively; 31.7; 22.7 and 36.1 years. The maxilla was more commonly involved than the mandible (1.3:1). The anterior maxilla was the commonest site (n=132; 37.4) followed by the posterior mandible (n=96; 29.4). Fifty three cases were associated with impacted teeth; and the highest frequency was for dentigerous cysts (n=37). Enucleation and curettage was performed on 300 patients; marsupialization on 14; and marginal/segmental resection on 12. Conclusion- To our knowledge; this is the first such study on a Libyan population. Our results are comparable to studies from other countries. Knowledge of the relative frequencies and sites of presentation of odontogenic cysts in different ethno-geographic backgrounds is essential for the early diagnosis and management of these benign yet potentially destructive lesions

Quiste odontogénico ortoqueratinizado: una nueva entidad derivada del queratoquiste odontogénico. Revisión de la literatura / Orthokeratinized odontogenic cyst: a new entity from the odontogenic keratocyst: a review of the literature

Son múltiples los recientes estudios e investigaciones que soportan claramente las diferencias clínicas, histopatológicas e inmunohistoquímicas entre las variantes paraqueratinizada y ortoqueratinizada del Queratoquiste Odontogénico, suscitándose de esta manera controversias entre los diferentes autores con respecto a este tema. Sin embargo, son muchos los que ya han fijado su posición y afirman, en base a diferentes hallazgos, que el Queratoquiste odontogénico y su variante ortoqueratinizada, son dos lesiones diferentes e independientes una de la otra. Desde 1981 se introdujo el término de Quiste Odontogénico Ortoqueratinizado, para describir esta entidad patológica que posee unas características bien definidas y cuyas alternativas de tratamiento son conservadoras debido a su baja recurrencia. La presente revisión de la literatura pretende establecer las diferencias entre el Queratoquiste Odontogénico, ya hoy considerado un tumor odontogénico, y el Quiste Odontogénico Ortoqueratinizado como dos entidades independientes

Quistes odontogénicos: aspectos histopatológicos significativos para su diagnóstico / Odontogenic cysts: histopathological aspects of significance for their diagnosis

Los quistes odontogénicos son estructuras cuyo revestimiento epitelial deriva del epitelio producido durante el desarrollo del aparato dental y para hacer un diagnóstico exacto de estas lesiones, es fundamental un análisis conjunto de sus características histológicas, clínicas y radiográficas. Se realizó un estudio retrospectivo sobre 36 quistes odontogénicos que ingresaron duraonte el período 2001-2002 al laboratorio de Anatomía Patológica de la Facultad de Odontología de la Universidad Nacional del Nordeste (Corrientes, Argentina). Los mismos se categorizaron por orden de frecuencia y se analizaron los patrones histopatológicos distintivos de cada uno de ellos, complementándolos con los informes clínicos y radiográficos. En coincidencia con la bibliografía consultada, el orden de frecuencia fue el siguiente: quistes radiculares, 23 casos, incluyendo los residuales (63 por ciento); quistes dentígeros 11 casos (31 por ciento) y queratoquistes, 2 casos (6 por ciento). Otros quistes no se observaron. Este estudio permitió corroborar las similitudes y características histopatológicas individuales que ayudan a la identificación de cada una de las variedades de quistes odontógenos, resaltando el valor de la interdisciplinariedad para el correcto diagnóstico y su implicancia en el manejo terapéutico posterior.

Ceratocisto odontogênico: estudo epidemiológico de 26 casos / Odontogenic keratocyst: an epidemiological study of 26 cases

O ceratocisto é um cisto odontogênico com manifestações clínicas e comportamento biológico bastante peculiar. Neste trabalho, os autores apresentam uma avaliação epidemiológica de 26 casos diagnosticados com ceratocisto odontogênico pelo Serviço de Patologia Oral do DO-UFRN. Observou-se uma maior ocorrência das lesões em pacientes do sexo masculino, raça branca, durante a quarta década de vida e acomentendo, principalmente, a região posterior de mandíbula. Com relação ao tempo de evolução, as lesões apresentaram um crescimento lento, não havendo predominância de um padrão radiográfico específico. O diagnóstico clínico e cirúrgico das entidades analisadas mostrou-se, na maioria das vezes, não condizente em relação ao diagnóstico histoparológico, sendo o ameloblastoma a principal lesão citada nas hipóteses diagnósticas.

Queratoquiste odontogenico: revisión de la literatura. Reporte de dos casos clinicos / Odontogenic keratocyst: review of the literature. Report of two clinical cases

El queratoquiste odontogÚnico constituye un tipo histológico de los quistes odontogÚnicos de desarrollo que se presentan entre la segunda y tercera dÚcada de la vida y tienen un segundo pico de aparición hacia la quinta dÚcada. La ubicación mßs frecuente es la zona del tercer molar inferior, ßngulo mandibular, desde donde progresa hacia la rama y el cuerpo. Su importancia radica en la alta tasa de recurrencia, entre el 30 y 60 por ciento. El queratoquiste odontogÚnico presenta caracterÝsticas histopatológicas que lo diferencian de otras lesiones quÝsticas. Se reportan dos casos: el primero se trata de un paciente de sexo masculino de 56 años de edad que presenta una expansión vestibular en la región del canino y premolar inferior izquierdo. El segundo caso se trata de una joven de 19 años de edad que presentó lesión expansiva de gran tamaño de ambas tablas óseas que se extendÝa desde el 45 hasta la escotadura sigmoidea, del lado derecho. DespuÚs de los exßmenes clÝnicos, radiogrßficos e histopatológicos se diagnosticó queratoquiste odontogÚnico en ambos casos. Se realizó tratamiento quirúrgico, obteniendo resultados satisfactorios