Tumor odontogénico epitelial calcificante en la rama mandibular. Informe de un caso clínico basado en una actualización bibliográfica / Calcifying epithelial odontogenic tumor in the mandibular ramus. A case report based on a literature update

Objetivo: Presentar un caso clínico de un tumor odon- togénico epitelial calcificante (TOEC), así como una revisión de la literatura disponible sobre esta neoplasia para contribuir al análisis del mejor método de tratamiento de la patología. Caso clínico: Se presenta el caso de una paciente mujer de 35 años con un tumor odontogénico epitelial calcifican- te que recibió tratamiento de enucleación quirúrgica con una evolución favorable y seguimiento de 5 años por medio de evaluación clínica y radiológica. La elección terapéutica se basó en el resultado de un análisis exhaustivo de la literatura para determinar el mejor abordaje de la neoplasia (AU)

Aim: To present a clinical case of a calcifying epithelial odontogenic tumor (CEOT), as well as a review of the availa- ble literature on this neoplasia to contribute to the analysis of the best treatment method for the pathology. Clinical case: The case of a 35-year-old patient with a calcifying epithelial odontogenic tumor who received surgical enucleation treatment with a favorable evolution and 5-year follow-up through clinical and radiological evaluation is pre- sented. The therapeutic choice was based on the result of an exhaustive analysis of the literature to determine the best ap- proach to the neoplasia (AU))

Fibroma ameloblástico mandibular: caso clínico / Fibroblastic fibroma mandibular: a clinical case

El fibroma ameloblástico (FA) se describe como una neoplasia benigna de origen odontogénico mixto que suele presentarse entre la primera y segunda década de vida, frecuentemente en los molares permanentes inferiores. Por lo general es asintomático, pero las lesiones de gran tamaño suelen acompañarse con dolor e inflamación. Su tratamiento por lo regular es conservador. Se describe el caso de un fibroma ameloblástico en un paciente de 13 años de edad, que involucraba cuerpo y ángulo mandibular izquierdo, tratado de manera conservadora, se realiza extirpación del tumor, regeneración ósea guiada y rehabilitación con implante dental (AU)

Ameloblastic fibroma (AF) is described as a benign neoplasm of mixed odontogenic origin that usually presents between the first and second decade of life, frequently in lower permanent molars. It is usually asymptomatic, but large lesions are usually accompanied by pain and inflammation. His treatment is generally conservative. The clinical case of an ameloblastic fibroma in a 13-year-old patient is described, involving the left mandibular body and angle, treated conservatively, tumor removal, guided bone regeneration and rehabilitation with dental implants are performed (AU)

Epidemiological and Clinicopathological Analysis of Odontogenic Tumors: A 20-Year Study

ABSTRACT Objective: To perform the epidemiological and clinicopathological analyses of odontogenic tumors in Kerman for 20 years. Material and Methods: The present study investigated collected records from pathology departments of the Faculty of Dentistry, Bahonar, and Shafa teaching-medical hospitals for 20 years. Data on odontogenic tumors was recorded based on age, sex, and tumor location in the information forms. The statistical t-test and the Kappa coefficient computer codes were utilized for data analysis. Results: 38 samples of odontogenic tumors were considered in the present study. The mean age of participants was 31.7± 10.3 years. The frequency of tumors was higher in women (63.2%) and in the lower jaw) 78.9%). Among various tumors, ameloblastoma (63.1%) and odontoma (18.4%) were the most common tumors, respectively. The correlation between clinical and histopathologic diagnoses was 71.8% using the kappa coefficient. Conclusion: Ameloblastoma is the most common odontogenic tumor. The incidence of lesions was higher in the mandible, and odontogenic tumors were higher in women. Since the diagnosis of odontogenic tumors is based on radiographic and histologic appearances, clinical physicians and pathologists should collaborate for the definitive diagnosis of the disease.

Actualización en el Diagnóstico y Tratamiento del Fibroma Ameloblástico: revisión sistemática / Update on the Diagnosis and Treatment of Ameloblastic Fibroma: systematic review

El fibroma ameloblástico (FA) es una neoplasia benigna con potencial de recurrencia y transformación maligna que afecta los huesos maxilofaciales. Se analizaron casos recientes de FA para describir sus características clínicas y opciones de tratamiento. El objetivo de este estudio es mejorar la comprensión de esta enfermedad poco común y brindar información relevante para el diagnóstico y manejo de los pacientes. Se realizó una revisión de la literatura en busca de reportes de caso de FA publicados en los últimos 5 años. Después de eliminar duplicados, se seleccionaron 16 estudios para su análisis. Se recopilaron datos sociodemográficos, ubicación de la lesión, signos clínicos, hallazgos radiográficos y opciones de tratamiento. Los estudios incluidos en el análisis reportaron casos de FA en pacientes con edades entre 4 y 21 años. Se observó una ligera predominancia en hombres. La ubicación más común de la lesión fue la mandíbula posterior. Los signos clínicos más frecuentes fueron el aumento de volumen óseo y el dolor. Radiográficamente, se encontraron principalmente lesiones radiolúcidas multiloculares. El tratamiento más común fue la enucleación de la lesión. No se observaron recurrencias durante el seguimiento de los casos reportados. Los resultados coinciden con la literatura reciente, proporcionando información actualizada sobre el perfil clínico y radiográfico del FA. La enucleación se muestra como una opción efectiva de tratamiento. Estos hallazgos contribuyen al diagnóstico preciso y al manejo adecuado de los pacientes con FA, resaltando la importancia de comprender las características clínicas de esta neoplasia.

Ameloblastic fibroma (AF) is a benign neoplasm with the potential for recurrence and malignant transformation that affects the maxillofacial bones. Recent cases of AF were analyzed to describe their clinical characteristics and treatment options. The objective of this study is to enhance understanding of this rare disease and provide relevant information for the diagnosis and management of patients. A literature review was conducted to identify case reports of AF published in the past 5 years. After removing duplicates, 16 studies were selected for analysis. Sociodemographic data, lesion location, clinical signs, radiographic findings, and treatment options were collected. The included studies reported cases of AF in patients aged between 4 and 21 years. There was a slight male predominance. The most common location of the lesion was the posterior mandible. The most frequent clinical signs were increased bone volume and pain. Radiographically, predominantly multilocular radiolucent lesions were found. The most common treatment was lesion enucleation. No recurrences were observed during the follow-up of the reported cases. The results align with recent literature, providing updated information on the clinical and radiographic profile of AF. Enucleation emerges as an effective treatment option. These findings contribute to accurate diagnosis and appropriate management of patients with AF, highlighting the importance of understanding the clinical characteristics of this neoplasm.

Odontoma composto em maxila: relato de caso / Compound odontoma in maxilla: a case report / Odontoma compuesto en maxilar: reporte de caso

Introdução: Os odontomas compostos são tumores odontogênicos benignos mistos, mais comumente encontrados na região anterior da maxila, com predileção pela segunda década de vida, podendo levar à má oclusão, interferência na erupção dos dentes, deslocamento e malformação dos dentes adjacentes. Em alguns casos, leva à erupção ectópica, diastemas persistentes, divergências do longo eixo do dente e assimetria facial. Devido a isso, o tratamento mais comum é a remoção cirúrgica conservadora. Relato de caso: Paciente do sexo masculino, 13 anos, com presença de odontoma composto em região anterior de maxila. O mesmo foi submetido à enucleação cirúrgica para remoção e diagnóstico adequado da lesão, a partir da análise anatomopatológica do espécime. Conclusão: Por ser uma patologia comum nos maxilares, é adequado que o profissional conheça suas principais características para o correto diagnóstico, bem como o tratamento mais adequado para cada paciente... (AU)

Introduction: Compound odontomas are mixed benign odontogenic tumors, most commonly found in the anterior maxillary region, with a predilection for the second decade of life, may lead to malocclusion, interference in the eruption of teeth, displacement and malformation of adjacent teeth. In some cases, it leads to ectopic eruption, persistent diastemas, divergences of the long axis of the tooth and facial asymmetry. Because of this, the most common treatment is conservative surgical removal. Case report: A 13 year-old male, with presence of compound odontoma in anterior region of maxilla. The patient was underwent surgical enucleation for treatment and propper diagnosis of lesion. Conclusion: As it is a common pathology in the jaws, it is appropriate for the professional to know its main characteristics for the correct diagnosis, as well as the most appropriate treatment for each patient... (AU)

Introduccíon: Los odontomas compuestos son tumores odontogénicos mixtos benignos, que se encuentran con mayor frecuencia en la región anterior del maxilar, con predilección por la segunda década de la vida, lo que puede ocasionar maloclusión, interferencia con la erupción dentaria, desplazamiento y malformación de los dientes adyacentes. En algunos casos, conduce a erupción ectópica, diastema persistente, divergencia del eje longitudinal del diente y asimetría facial. Debido a esto, el tratamiento más común es la extirpación quirúrgica conservadora. Reporte de caso: Paciente masculino, de 13 años, con presencia de odontoma compuesto en la región anterior del maxilar. El mismo fue sometido a enucleación quirúrgica para extirpación y adecuado diagnóstico de la lesión, a partir del análisis anatomopatológico del espécimen. Conclusíon: Por tratarse de una patología común en los maxilares, es conveniente que el profesional conozca sus principales características para el correcto diagnóstico, así como el tratamiento más adecuado para cada paciente... (AU)

Cirurgia de aproveitamento de dente incluso associada a odontoma: relato de caso / Surgery to use an impacted tooth associated with odontoma: case report / Cirugía para uso de diente incluido asociado a odontoma: reporte de caso

Introdução: Odontoma é o tipo mais comum de tumor odontogênico, contudo são lesões assintomáticas, de crescimento lento e indolor, descobertos geralmente em consultas de rotina, e que muito comumente são causadores de impactação dentária. Esse trabalho tem por objetivo relatar o caso clínico de uma criança que apresentava um odontoma composto na pré-maxila, ocasionando a impactação de seu incisivo central e comprometimento estético. Relato de caso: Paciente de 12 anos, em preparo para tratamento ortodôntico, no qual na etapa de exames de imagem, foi percebido um odontoma composto na região anterior da maxila o qual impedia a irrupção do dente 21, onde para que se conseguisse o melhor aproveitamento estético e funcional, foi indicado a remoção do tumor com 43 estruturas semelhantes a dentes e o tracionamento do dente associado. Conclusão: O tratamento do odontoma não costuma ter recidivas, permitindo o aproveitamento de possíveis dentes associados e manutenção de estruturas nobres adjacentes. Possibilitando também, o tracionamento do dente impactado ao arco dental, restituindo saúde e estética... (AU)

Introduction: Odontoma is the most common type of odontogenic tumor. They are asymptomatic, slow-growing lesions of unknown etiopathogenesis. They have a density similar to teeth, surrounded by a thin radiolucent halo. Objective: To report a clinical case of traction surgery of an impacted tooth associated with compound odontoma, and a brief literature review. Case report: Patient presented composite odontoma in the anterior region of the maxilla, preventing the eruption of tooth 21. The lesion was noticed during the preparation of the orthodontic treatment and for the success of such procedure, the treatment consisted of the excision of the lesion composed of 43 similar structures to teeth and the preparation of the traction of the maxillary central incisor. Conclusion: The removal of the odontoma was extremely relevant, with this, the impacted tooth was exposed, allowing the placement of the orthodontic button for its traction. Positioning the missing tooth in the dental arch, restoring health and aesthetics... (AU)

Introducción: El odontoma es el tipo más común de tumor odontogénico. Son lesiones asintomáticas, de crecimiento lento y de etiopatogenia desconocida. Tienen una densidad similar a los dientes, rodeados de un fino halo radiotransparente. Objetivo: Reportar un caso clínico de cirugía de tracción de un diente retenido asociado a odontoma compuesto, y una breve revisión de la literatura. Reporte de caso: Paciente presentó odontoma compuesto en la región anterior del maxilar, impidiendo la erupción del diente 21. La lesión fue notada durante la preparación del tratamiento de ortodoncia y para el éxito de dicho procedimiento, el tratamiento consistió en la escisión de la lesión. compuesto por 43 estructuras similares a los dientes y la preparación de la tracción del incisivo central maxilar. Conclusión: La remoción del odontoma fue de suma relevancia, con esto se logró exponer el diente impactado, permitiendo la colocación del botón de ortodoncia para su tracción. Posicionamiento del diente faltante en la arcada dentaria, restaurando la salud y la estética... (AU)

Complicações pós-operatórias relacionadas a ressecção do ameloblastoma / Postoperative complications related to ameloblastoma / Complicaciones postoperatorias relacionadas con la resección de ameloblastoma

A ressecção é o tratamento de escolha para tratamento do ameloblastoma, este que é o tumor odontogênico mais comuns, excluindo os odontomas. A desregulação de diversos genes no desenvolvimento de dentes pode desempenhar papel em sua histogênese. Alguns eventos adversos podem ocorrer durante seu tratamento pós-operatório. Recidivas ocorrem porque o ameloblastoma tende a se infiltrar entre o trabeculado ósseo esponjoso intacto na periferia do tumor antes que a reabsorção óssea se torne radiograficamente evidente. Consequentemente, a margem real do tumor sempre se estende além da sua imagem radiográfica ou da margem clínica. Deiscência de sutura é uma complicação que pode ocorrer no pós-operatório imediato na qual as bordas da ferida, que estão unidas por uma sutura, acabam se abrindo, aumentando o risco de infecção e dificultando assim a cicatrização. Fratura de placa de reconstrução é um evento possível de ocorrer em tratamentos de grandes defeitos. O estresse causado pela modelagem da placa durante a conformação da placa, além da ação muscular são uns dos fatores que pode fragilizar o metal da placa. Outras complicações podem ocorrer como: assimetrias, parestesia temporária e permanente do nervo alveolar inferior e deficiência estética e funcional. As descrições destes eventos na literatura ajudam aos clínicos conhecer e tentá-lo preveni-lo e com saber tratar... (AU)

Resection is the treatment of choice for treating ameloblastoma, which is the most common odontogenic tumor, excluding odontomas. The dysregulation of several genes in the development of teeth may play a role in their histogenesis. Some adverse events may occur during your postoperative treatment. Relapses occur because ameloblastoma tends to infiltrate between intact cancellous bone trabeculae at the pe riphery of the tumor before bone resorption becomes radiographi cally evident. Consequently, the actual tumor margin always extends beyond its radiographic image or clinical margin. Suture dehiscence is a complication that can occur in the immediate postoperative period in which the edges of the wound, which are joined by a suture, end up opening, increasing the risk of infection and thus hindering healing. Reconstruction plate fracture is a possible event to occur in large de fect treatments. The stress caused by the modeling of the plate during the formation of the plate, in addition to muscle action, are one of the factors that can weaken the plate metal. Other complications may occur, such as: asymmetries, temporary and permanent paresthesia of the inferior alveolar nerve and aesthetic and functional deficiency. The descriptions of these events in the literature help clinicians to Resection is the treatment of choice for treating ameloblastoma, which is the most common odontogenic tumor, excluding odontomas. The dysregulation of several genes in the development of teeth may play a role in their histogenesis. Some adverse events may occur during your postoperative treatment. Relapses occur because ameloblastoma tends to infiltrate between intact cancellous bone trabeculae at the pe riphery of the tumor before bone resorption becomes radiographi cally evident. Consequently, the actual tumor margin always extends beyond its radiographic image or clinical margin. Suture dehiscence is a complication that can occur in the immediate postoperative period in which the edges of the wound, which are joined by a suture, end up opening, increasing the risk of infection and thus hindering healing. Reconstruction plate fracture is a possible event to occur in large de fect treatments. The stress caused by the modeling of the plate during the formation of the plate, in addition to muscle action, are one of the factors that can weaken the plate metal. Other complications may occur, such as: asymmetries, temporary and permanent paresthesia of the inferior alveolar nerve and aesthetic and functional deficiency. The descriptions of these events in the literature help clinicians to know and try to prevent them and to know how to treat them... (AU)

La resección es el tratamiento de elección para tratar el ameloblastoma, que es el tumor odontogénico más común, excluyendo los odontomas. La desregulación de varios genes en el desarrollo de los dientes puede desempeñar un papel en su histogénesis. Algunos eventos adversos pueden ocurrir durante su tratamiento postoperatorio. Las recaídas ocurren porque el ameloblastoma tiende a infiltrarse entre las trabéculas del hueso esponjoso intacto en la periferia del tumor antes de que la reabsorción ósea sea evidente en las radiografías. En consecuencia, el margen tumoral real siempre se extiende más allá de su imagen radiográfica o margen clínico. La dehiscencia de sutura es una complicación que puede ocurrir en el postoperatorio inmediato en el que los bordes de la herida, que están unidos por una sutura, acaban abriéndose, aumentando el riesgo de infección y dificultando así la cicatrización. La fractura de la placa de reconstrucción es un evento posible que ocurre en los tratamientos de defectos grandes. Los esfuerzos que provoca el modelado de la placa durante la conformación de la placa, además de la acción muscular, son uno de los factores que pueden debilitar la placa metálica. Pueden presentarse otras complicaciones como: asimetrías, parestesias temporales y permanentes del nervio alveolar inferior y deficiencia estética y funcional. Las descripciones de estos eventos en la literatura ayudan a los clínicos a conocerlo y tratar de prevenirlo y saber cómo tratarlo... (AU)

Tratamento de odontoma composto e cisto dentígero: relato de caso / Treatment of compound odontoma and dentigeral cyst: case report

Introdução: o odontoma é considerado como um frequente tumor odontogênico benigno, podendo ser classificado em tipo composto ou tipo complexo. O cisto dentígero é o mais comum entre os cistos odontogênicos de desenvolvimento, onde envolve a coroa da unidade dentária no nível da junção amelocementária. Há poucos estudos na literatura do encontro das duas lesões, acometendo o mesmo local na cavidade oral. O diagnóstico pode ser constituído por exame clínico e de imagem. Objetivo: apresentar um caso clínico de odontoma composto e cisto dentígero em região de parassínfise mandibular esquerda abordando as caraterísticas clínicas destas duas lesões e as adequadas formas de tratamento. Relato de caso: paciente do sexo masculino, 16 anos de idade, compareceu ao ambulatório do Centro Odontológico da Escola Bahiana de Medicina e Saúde Pública (Salvador, Bahia), portando encaminhamento de ortodontista, solicitando exodontia da unidade dentária 33 inclusa associada a um odontoma. Ao realizar exames físicos e imaginológicos detectou-se a hipótese diagnóstica de odontoma composto associado a unidade dentária, envolto em folículo pericoronário ou cisto dentígero. Foi realizada biópsia excisional das duas lesões e exodontia da unidade. A análise histopatológica confirmou o diagnóstico para odontoma composto associado a cisto dentígero na unidade 33. Ao acompanhamento de 03 meses, paciente apresentou neoformação óssea da região de parassínfise mandibular, mediante a análise de novos exames imaginológicos. Discussão: há poucos estudos na literatura da associação entre as duas lesões, porém relatos afirmam que o odontoma pode ser encontrado associado aos cistos odontogênicos. Por conta da falta de maiores estudos dessa associação, há escassez de recomendações terapêuticas de acordo com faixa etária e extensão do acometimento das lesões. Considerações finais: lesões comumente assintomáticas, tem o diagnóstico constituído por exame clínico e avaliação de exames de imagem(AU)

Introduction: odontoma is considered a frequent benign odontogenic tumor and can be classified as a compound or complex type. The dentigerous cyst is the most common among developmental odontogenic cysts, where it involves the crown of the dental unit at the level of the cementoenamel junction. There are few studies in the literature on the meeting of the two lesions, affecting the same site in the oral cavity. The diagnosis can be made by clinical and imaging examination. Objective: to present a clinical case of compound odontoma and dentigerous cyst in the left mandibular parasymphysis region, addressing the clinical characteristics of these two lesions and the appropriate forms of treatment. Case report: male patient, 16 years old, attended the outpatient clinic of the Centro Odontológico da Escola Bahiana de Medicina e Saúde Pública (Salvador, Bahia), having been referred by an orthodontist, requesting extraction of the included dental unit 33 associated with an odontoma. Upon physical and imaging examinations, the diagnostic hypothesis of a compound odontoma associated with a dental unit, surrounded by a pericoronal follicle or dentigerous cyst, was detected. Excisional biopsy of the two lesions and extraction of the unit were performed. The histopathological analysis confirmed the diagnosis of compound odontoma associated with dentigerous cyst in unit 33. At the 03-month follow-up, the patient presented bone neoformation in the mandibular parasymphysis region, through the analysis of new imaging exams. Discussion: there are few studies in the literature on the association between the two lesions, but reports state that odontoma can be found associated with odontogenic cysts. Due to the lack of further studies on this association, there is a lack of therapeutic recommendations according to age group and extent of lesion involvement. Final considerations: commonly asymptomatic lesions, the diagnosis consists of clinical examination and evaluation of imaging tests(AU)

Manejo conservador de um ameloblastoma unicístico / Conservative manegement of a unicystic ameloblastoma / Manejo conservador de un ameloblastoma unicístico

Objetivo: Ponderar, através de um relato de caso, os benefícios da escolha por um tratamento conservador em casos de ameloblastoma unicístico. Relato de caso: O presente trabalho relata um ameloblastoma unicístico em uma paciente do sexo feminino com 20 anos que procurou atendimento 2 anos após notar a presença da lesão. Foi realizado um protocolo de tratamento conservador, e após 1 anos e 6 meses de proservação constatou-se uma recidiva, que foi removida por enucleação e curetagem. Conclusão: O ameloblastoma não é um tumor maligno com capacidade de metástase e não deve ser tratado como tal. O tratamento radical dessa patologia cria sequelas que tornam a reabilitação difícil. Em contrapartida, o tratamento conservador pode ser realizado em ambiente ambulatorial, trazendo baixos impactos funcionais, estéticos e psicológicos ao paciente... (AU)

Objective: To consider, through a case report, the benefits of choosing a conservative treatment in cases of unicystic ameloblastoma. Case report: This paper reports a unicystic ameloblastoma in a 20-year-old female patient who sought care 2 years after noticing the presence of the lesion. A conservative treatment protocol was performed, and after 1 year and 6 months of follow-up, a recurrence was found, which was removed by enucleation and curettage. Conclusion: Ameloblastoma is not a malignant tumor capable of metastasizing and should not be treated as such. The radical treatment of this pathology creates sequelae that make rehabilitation difficult. On the other hand, conservative treatment can be performed in an outpatient setting, bringing low functional, aesthetic and psychological impacts to the patient... (AU)

Objetivo: Considerar, a través de un reporte de caso, los beneficios de elegir un tratamiento conservador en casos de ameloblastoma uniquístico. Reporte de caso: Este trabajo reporta un ameloblastoma uniquístico en una paciente de 20 años de edad que acude a consulta 2 años después de notar la presencia de la lesión. Se realizó un protocolo de tratamiento conservador y luego de 1 año y 6 meses de seguimiento se encontró una recidiva, la cual fue extirpada mediante enucleación y curetaje. Conclusión: El ameloblastoma no es un tumor maligno capaz de metastatizar y no debe ser tratado como tal. El tratamiento radical de esta patología deja secuelas que dificultan la rehabilitación. Por otro lado, el tratamiento conservador puede realizarse en forma ambulatoria, trayendo bajo impacto funcional, estético y psicológico al paciente... (AU)

Ameloblastoma uniquístico con patrón plexiforme: revisión de la literatura a propósito de un caso clínico / Unicystic ameloblastoma with a plexiform pattern: literature review regarding a clinical case

En 1827 el médico James William Cusack describió una lesión tumoral expansiva con características clínicas similares al ameloblastoma. Para el 2017 la Organización Mundial de la Salud lo clasificó como un tumor odontogénico benigno de origen epitelial. En la actualidad hemos aceptado la teoría de su etiología asociada con una mutación en el biomarcador BRAF-V600E, donde se presentan claras heterogeneidades extra/intratumorales en el metabolismo de la tumorogénesis; la mutación en BRAF genera cambios en la regulación de la odontogénesis, en conjunto con el gen CDC73 presente en el cromosoma 1 q25-q32, lo que produce un cambio en la proteína parafibromina que inhibe la proliferación celular durante el crecimiento y la división celular, esto afecta en conjunto al gen p53 y su homólogo p63 presentes en el cromosoma 17, por lo que se tiene como resultado la expresión de quistes y tumores dentales como el ameloblastoma. La presente obra muestra el caso clínico de un paciente femenino de 11 años de edad con aumento de volumen en la región submandibular izquierda de 7 × 4 cm, con seis años de evolución; de tal manera que fue diagnosticado con ameloblastoma uniquístico y tratado de forma conservadora mediante enucleación, posteriormente fue valorada anualmente hasta que la paciente cumplió los 18 años de edad (AU)

In 1827, physician James William Cusack described an expansive tumor lesion with clinical characteristics similar to ameloblastoma. For 2017, the World Health Organization classified it as a benign odontogenic tumor of epithelial origin. Currently, we have accepted the theory of its etiology associated with a mutation in the BRAF-V600E biomarker, where there are clear extra/intratumoral heterogeneities in the metabolism of tumorigenesis; the BRAF mutation generates changes in the regulation of odontogenesis, together with the CDC73 gene present on chromosome 1 q25-q32, producing a change in the parafibromin protein that inhibits cell proliferation during cell growth and division, which together it affects the p53 gene and its p63 homolog is present on chromosome 17, resulting in the expression of dental cysts and tumors such as ameloblastoma. This work provides the clinical case of an 11-year-old patient with an increase in volume in the left submandibular region of 7 × 4 cm of 6 years of evolution. Being diagnosed as a unicistic ameloblastoma and treated conservatively by enucleation, it is subsequently evaluated annually until the patient reaches 18 years of age (AU)

Lesiones cervicofaciales tumorales y pseudotumorales pediátricas en Villa Clara. Años 2010-2019 / Pediatric tumoral and pseudotumoral cervicofacial lesions in Villa Clara from 2010 to 2019

Caracterizar las lesiones cervicofaciales tumorales y pseudotumorales en niños en Villa Clara es una necesidad creciente por las alteraciones físicas, estéticas y psicológicas que pueden ocasionar. Se realizó un estudio transversal y descriptivo en el Servicio de Cirugía Maxilofacial Pediátrico de esta provincia, en el período 2010-2019. La población estuvo constituida por 101 niños con estudio histológico concluyente de lesión tumoral benigna, maligna o pseudotumoral de la región cervicofacial. Se concluyó que los tumores y pseudotumores en la región cervicofacial no tuvieron relación con la edad, género, ni color de la piel, en los niños estudiados. En esta serie predominaron los tumores benignos. El tumor maligno de mayor prevalencia fue el Linfoma de Burkitt. Existió alta correlación entre los diagnósticos clínico e histológico.

Characterizing tumoral and pseudotumoral cervicofacial lesions in children in Villa Clara is a growing need due to the physical, aesthetic and psychological alterations that they can cause. A cross-sectional and descriptive study was carried out in the pediatric maxillofacial surgery service of this province from 2010 to 2019. The population consisted of 101 children with conclusive histological study of benign and malignant tumoral or pseudotumoral lesions of the cervicofacial region. We concluded that tumors and pseudotumors in the cervicofacial region were not related to age, gender or skin color in the studied children. In this series, benign tumors predominated. The most prevalent malignant tumor was Burkitt's lymphoma. There was a high correlation between clinical and histological diagnoses.

Ethanol Ablation for Odontogenic myxoma: New alternative of conservative treatment

Odontogenic myxoma is a maxillofacial tumor that is benign in nature. It is characterized by a slow-growing, painless, and site-aggressive behavior. A main feature is that it is not encapsulated so it has high potential of invasiveness and penetration into peripheral tissues. Large lesions may cause extensive compromise of the region. Treatment strategy for Odontogenic Myxoma is still controversial. Radical resection with an appropriate surgical margin is recommended, but emerging evidence has suggested that a more conservative approach will result in less morbidity and adequate results. This report shows a remarkable result on a 16-year-old patient who had a Mandibular Odontogenic Myxoma treated with a conservative approach. Intra-lesional absolute alcohol irrigation was performed during a 5-month period. Considerable volume reduction of the lesion happened which allowed a minimal overall resection. No recurrence was found after a 3 year follow-up.

Pattern of histologic variants of ameloblastoma in a secondary health care facility in Lagos state a 5-year retrospective study

Ameloblastoma is a benign epithelial odontogenic neoplasm which is common amongst the Yoruba ethinc group. The various histologic types have been elucidated. Aim: This study aimed to assess the prevalent histologic types of ameloblastoma in a Lagos secondary health care facility. Methodology: A 5-year retrospective review of histopathologically diagnosed slides were retrieved. Data extracted include the age, gender, location, ethnicity and histologic variants were analysed by SPSS version 26. Percentages, ratio, mean, standard deviation and crude odd ratio were determined, and p-value ⩽ 0.05 is considered significant. Result: A total of seventy-seven histopathologically diagnosed ameloblastoma slides were retrieved. Males were more affected than females in ratio 1.2:1 with the mean age 33.61±13.3. Ameloblastoma was commonest in the third decade of life and more in the mandible than maxilla. Yoruba ethnic group was most affected. The commonest histologic type was the unicystic type with intraluminal subtype accounting for the largest proportion. There was significant association between histologic types and gender (p= 0.037). Crude odd ratio revealed the odds in the unicystic type between male and female {p=0.041; CI=95%, OR=2.649(1.042-6.733)} and in the follicular between male and female {p=0.013; CI=95%, OR=3.855(1.321-11.288)}. Conclusion: The unicystic histologic type of ameloblastoma was the commonest, occurring more in females and this was followed by the follicular histologic type which occurred more in males in this Lagos State secondary health care facility.

Pattern of histologic variants of ameloblastoma in a secondary health care facility in Lagos State: A 5-year retrospective study

Background: Ameloblastoma is a benign epithelial odontogenic neoplasm which is common among the dwellers of sub-Saharan Africa. The various histologic types have been elucidated. Aim: This study aimed to assess the prevalent histologic types of ameloblastoma in a Lagos secondary health care facility. Materials and methods: A five-year retrospective review of histopathologically diagnosed slides was done. Data extracted include the age, gender, location, ethnicity, and histologic variants, which were analysed with SPSS version 26. Percentages, ratio, mean, standard deviation were determined, and p-value ⩽ 0.05 was considered significant. Result: A total of 77 histopathologically diagnosed ameloblastoma slides were included in this study. Males were more affected than females in ratio 1.2:1 with the mean age 33.61±13.3. Ameloblastoma was commonest in the third decade of life and more in the mandible than maxilla. The commonest histologic type was the conventional/follicular type which occurred more in males and this was followed by the unicystic/intraluminal type. Conclusion: The commonest histologic variant was the follicular (conventional) and occurred more in males. This was followed by the intraluminal (unicystic) histologic variant that was commoner in females in this Lagos State secondary health care facility.

Frequency of central odontogenic tumors: a retrospective study in an Iraqi population utilizing 2022 WHO head and neck tumors classification / Frequência de tumores odontogênicos centrais: um estudo retrospectivo em uma população iraquiana utilizando a classificação de tumores de cabeça e pescoço da OMS de 2022

Objectives: Odontogenic tumors occupy an important position among head and neck tumors. Although, rarely encountered in medical practice but they considered increasingly challenging lesions for the clinicians due to their overlapping clinical and histopathological features. This study was designed to determine the relative frequency of central odontogenic tumors in an Iraqi population by utilizing 2022 WHO tumor classification. Material and methods: Sixty cases of central odontogenic tumors from a total of 1869 case records were retrieved retrospectively from the file archive of the histopathology laboratory in Baghdad medical city from the period of 2016 to 2021. For each individual case, data regarding age, gender, location, and tumor type were collected and analyzed. Results: odontogenic tumors constituted 3.2% of the total cases analyzed mostly benign. The male to female ratio was 1/1. The age of the patients ranged from 11 to 75 years. Most cases were recorded in the third and fourth decades of life (n=31, 51.6%). The most common benign and malignant tumors were ameloblastoma and ameloblastic fibrosarcoma respectively. Most of these tumors located in the mandible (n= 45, 75%). The most common mandibular tumor was ameloblastoma followed by ameloblastic fibroma, and odontogenic myxoma. Regarding maxillary tumors, the predominant tumor was ameloblastoma followed by ameloblastic fibroma, ameloblastic fibrosarcoma, and clear cell odontogenic carcinoma. Conclusions: Odontogenic tumors in an Iraqi population occurred more commonly in the mandible and showed no sex predilection. Most cases were diagnosed in third and fourth decades of life and ameloblastoma was the most frequent odontogenic tumor. The relative frequency of malignant odontogenic tumors was 11.67% of all cases studied mostly ameloblastic fibrosarcoma. (AU)

Objetivos: Os tumores odontogênicos ocupam uma posição importante entre os tumores de cabeça e pescoço. Embora raramente encontrados na prática médica, eles consideram lesões cada vez mais desafiadoras para os clínicos devido às suas características clínicas e histopatológicas sobrepostas. Este estudo foi desenhado para determinar a frequência relativa de tumores odontogênicos centrais em uma população iraquiana, utilizando a classificação de tumor da OMS de 2022. Materiais e métodos: Sessenta casos de tumores odontogênicos centrais de um total de 1.869 registros de casos foram recuperados retrospectivamente do arquivo do laboratório de histopatologia na cidade médica de Bagdá no período de 2016 a 2021. Para cada caso individual, dados sobre idade, sexo , localização e tipo de tumor foram coletados e analisados. Resultados: os tumores odontogênicos constituíram 3,2% do total de casos analisados em sua maioria benignos. A proporção entre homens e mulheres era de 1/1. A idade dos pacientes variou de 11 a 75 anos. A maioria dos casos foi registrada na terceira e quarta décadas de vida (n=31, 51,6%). Os tumores benignos e malignos mais comuns foram ameloblastoma e fibrossarcoma ameloblástico, respectivamente. A maioria desses tumores localizava-se na mandíbula (n= 45, 75%). O tumor mandibular mais comum foi o ameloblastoma, seguido do fibroma ameloblástico e do mixoma odontogênico. Em relação aos tumores maxilares, o tumor predominante foi o ameloblastoma seguido de fibroma ameloblástico, fibrossarcoma ameloblástico e carcinoma odontogênico de células claras. Conclusões: Os tumores odontogênicos em uma população iraquiana ocorreram mais comumente na mandíbula e não mostraram predileção por sexo. A maioria dos casos foi diagnosticada na terceira e quarta décadas de vida, sendo o ameloblastoma o tumor odontogênico mais frequente. A frequência relativa de tumores odontogênicos malignos foi de 11,67% de todos os casos estudados principalmente fibrossarcoma ameloblástico (AU)

Application of Deep Learning in Differential Diagnosis of Ameloblastoma and Odontogenic Keratocyst Based on Panoramic Radiographs / 中国医学科学院学报

Objective To evaluate the accuracy of different convolutional neural networks (CNN),representative deep learning models,in the differential diagnosis of ameloblastoma and odontogenic keratocyst,and subsequently compare the diagnosis results between models and oral radiologists. Methods A total of 1000 digital panoramic radiographs were retrospectively collected from the patients with ameloblastoma (500 radiographs) or odontogenic keratocyst (500 radiographs) in the Department of Oral and Maxillofacial Radiology,Peking University School of Stomatology.Eight CNN including ResNet (18,50,101),VGG (16,19),and EfficientNet (b1,b3,b5) were selected to distinguish ameloblastoma from odontogenic keratocyst.Transfer learning was employed to train 800 panoramic radiographs in the training set through 5-fold cross validation,and 200 panoramic radiographs in the test set were used for differential diagnosis.Chi square test was performed for comparing the performance among different CNN.Furthermore,7 oral radiologists (including 2 seniors and 5 juniors) made a diagnosis on the 200 panoramic radiographs in the test set,and the diagnosis results were compared between CNN and oral radiologists. Results The eight neural network models showed the diagnostic accuracy ranging from 82.50% to 87.50%,of which EfficientNet b1 had the highest accuracy of 87.50%.There was no significant difference in the diagnostic accuracy among the CNN models (P=0.998,P=0.905).The average diagnostic accuracy of oral radiologists was (70.30±5.48)%,and there was no statistical difference in the accuracy between senior and junior oral radiologists (P=0.883).The diagnostic accuracy of CNN models was higher than that of oral radiologists (P<0.001). Conclusion Deep learning CNN can realize accurate differential diagnosis between ameloblastoma and odontogenic keratocyst with panoramic radiographs,with higher diagnostic accuracy than oral radiologists.

Central Granular Cell Odontogenic Tumor: A Literature Review of Cases Reported in the Last 71 Years with a New Case Report / 中国医学科学杂志(英文版)

Central granular cell odontogenic tumors (CGCOTs) are rare, benign, slowly growing odontogenic neoplasms. Due to their uncertain histogenesis, CGCOTs are still not included as a distinct entity in the WHO classification (2017) of odontogenic tumors. We report a case of CGCOT involving the right side of maxillary anterior region of a 39-year-old white female. Immunohistochemical staining showed that granular cells positively expressed CD68 and vimentin, and negatively expressed S-100 protein. Meanwhile, we searched PubMed, Google Scholar, and Scopus databases to summary the clinico-pathological features of 51 reported cases of CGCOT. The results showed that the granular cells of 28.6% cases were immunopositive for vimentin and CD68, and odontogenic epithelial cells were positive immunoreactivity for cytokeratin. These findings reinforced the mesenchymal origin of granular cells and the odontogenic nature of epithelium islands.

Tratamento cirúrgico do mixoma odontogênico sem ressecção maxilar: relato de caso / Surgical Treatment od Odontogenic Mixoma Without Maxillary Resection: Case Report / Tratamiento Quirúrgico del Mixoma Odontogénico Sin Resección Maxilar: Informe de Caso

Mixoma Odontogênico é um tumor de origem mesenquimal raro, de desenvolvimento lento e agressivo que acomete indivíduos entre os 10 e 40 anos de idade e principalmente, do gênero feminino. Este estudo teve como principal objetivo descrever um caso clinico de tratamento cirúrgico do mixoma odontogênico sem ressecção maxilar em uma paciente do gênero feminino que compareceu ao Ambulatório de Patologia Oral e Maxilo Facial, da Faculdade de Odontologia da UNIRG, na cidade de Gurupi-TO - Brasil. A paciente foi submetida ao tratamento cirúrgico conservador, através da curetagem e enucleação total do tumor. A proservação foi realizada em períodos de 12 meses, 24 meses e 48 meses aonde pode-se observar a sequencial e completam reparação óssea, inclusive a permanência dos dentes envolvidos que foram submetidos a tratamento endodôntico com total remodelação da lâmina dura e do ligamento periodontal... (AU)

Odontogenic Myxoma (OM) is a rare tumor of mesenchymal origin, of slow and aggressive development that affects individuals between 10 and 40 years of age and mainly female. This study aimed to describe a clinical case of surgical treatment of odontogenic myxoma with out maxillary resection in a female patient who attended the Outpa tient Clinic of Oral Pathology and Facial Maxillo, of UNIRG Dental School, in the city of Gurupi-TO - Brazil. The patient underwent con servative surgical treatment through curettage and total enucleation of the tumor. Proservation was carried out in periods of 12 months, 24 months and 48 months where it was possible to observe the sequential and complete bone repair including the permanence of the involved teeth that underwent endodontic treatment with total remodeling of hard blade and of the periodontal ligament... (AU)

El mixoma odontogénico es un tumor de origen mesenquimal poco frecuente, de desarrollo lento y agresivo que afecta a individuos entre 10 y 40 años de edad y principalmente mujeres. El objetivo principal de este estudio fue describir un caso clínico de tratamiento quirúrgico de mixoma odontogénico sin resección maxilar en una paciente femenina que asistió a la Clínica Ambulatoria de Patología Oral y Maxilo Facial, de la Facultad de Odontología de UNIRG, en la ciudad de Gurupi-TO - Brasil. El paciente se sometió a tratamiento quirúrgico conservador mediante legrado y enucleación tumoral total. La conservación se realizó en periodos de 12 meses, 24 meses y 48 meses donde es posible observar reparación ósea secuencial y completa, incluyendo la permanencia de los dientes implicados que fueron sometidos a tratamiento endodóntico con remodelación total de la durancia y ligamento periodontal... (AU)

Odontoma composto extenso em paciente pediátrico: relato de caso / Extended compound odontoma in a pediatric patient: case report / Odontoma compuesta ampliada en paciente pediátrico: reporte de caso

Introdução: Odontomas são tumores odontogênicos, considerados hamartomas de desenvolvimento que frequentemente interferem na erupção dentária. O presente estudo tem como objetivo relatar o caso clínico de odontoma composto em região posterior da mandíbula, desde o achado radiográfico até o momento cirúrgico e confirmação diagnóstica com exame histopatológico. Relato do caso: trata-se de paciente do sexo feminino, 7 anos, branca, encaminhada da Unidade de Saúde da Família (USF) ao ambulatório do Serviço de Cirurgia e Traumatologia Buco-Maxilo-Facial do Hospital Universitário Oswaldo Cruz (UHOC), devido a um achado radiográfico radiopaco, de limites bem definidos, com halo radiolúcido circundante, no corpo da mandíbula do lado esquerdo, entre as raízes dos dentes 74 e 75. O tratamento proposto foi a excisão cirúrgica conservadora sob anestesia geral. Após a retirada da lesão, foram identificadas calcificações múltiplas diferentes tamanhos e formas, de assemelhando-se a dentículos, encaminhadas para exame histopatológico e confirmando o diagnóstico de odontoma composto. Após 7 dias, observou-se um processo de cicatrização satisfatório. Ela será acompanhada para analisar a progressão do reparo e movimentação da bolsa óssea na dentição permanente na região. Considerações finais: Portanto, recomenda-se o tratamento cirúrgico conservador, através da remoção completa da lesão e preservação máxima dos dentes retidos. Para isso, a identificação na fase inicial e o tratamento adequado são essenciais... (AU)

Introduction: Odontomas are odontogenic tumors, considered developmental hamartomas that often interfere with tooth eruption. The present study aims to report the clinical case of compound odontoma in the posterior region of the jaw, from the radiographic finding to the surgical moment and diagnostic confirmation with histopathological examination. Case report: this is a female patient, 7 years old, white, referred from the Family Health Unit (FHU) to the outpatient clinic of the Oral and Maxillofacial Surgery and Traumatology Service of the Oswaldo Cruz University Hospital (OCUH), due to a radiopaque radiographic finding, with well-defined limits and a surrounding radiolucent halo, in the body of the jaw on the left side, between the roots of teeth 74 and 75. The proposed treatment was conservative surgical excision under general anesthesia. After removal of the lesion, multiple calcifications of different sizes and shapes were identified, resembling denticles, referred for histopathological examination and confirming the diagnosis of compound odontoma. After 7 days, a satisfactory healing process was observed. She will be followed up to analyze the progression of bone pocket repair and movement in permanent dentition in the region. Final considerations: Therefore, conservative surgical treatment is recommended, through the complete removal of the lesion and maximum preservation of retained teeth. For this identification at an early stage and proper treatment are essential... (AU)