Peripheral squamous odontogenic tumor associated with an impacted mandibular third molar: A case report

Introduction: Squamous odontogenic tumor is a benign but locally infiltrative, epithelial odontogenic tumor. This case report presents a case of a peripheral variant of squamous odontogenic tumor. Case Presentation: A 29-year-old male patient presented with pain in the left posterior mandible region for one month. Radiographic examination revealed an impacted left mandibular third molar with no other abnormalities. Management and Prognosis: The impacted tooth was removed under local anaesthesia. Histopathological examination of the abnormally thick pericoronal tissue, covering the impacted tooth revealed islands of bland squamous epithelium in a background of mature fibrous connective tissue. The prognosis was good with no signs of recurrence after one year of follow- up. Conclusion: Squamous odontogenic tumor should be considered in the differential diagnosis of pericoronal pathoses, although it is rare in this location.

Surgical management of plexiform ameloblastoma presenting as exophytic growth ­ A rare entity

Ameloblastoma is locally aggressive neoplasm of odontogenic origin comprising about 1% among tumours and cysts that usually occurs in the vicinity of the mandibular molars or ramus of the mandible. Predominantly occurring in third to fifth decade, with no gender propensity. Inadequate treatment may lead to recurrence in certain cases. Even though benign in growth, they are locally aggressive and can occasionally metastasize. Of them, a unique exophytic presentation of plexiform ameloblastoma in a 22-year-old male patient is documented as follows.

A clinicopathologic study of 173 odontogenic tumours in Northern Peninsular Malaysia (2007-2014)

@#Introduction: The objectives of this study were to analyse, compare and contrast the demographic, clinical and pathological data of odontogenic tumours seen at a regional oral pathology centre in the Northern part of Peninsular Malaysia with other international data as an aid to clinicians in diagnosing odontogenic tumours. Materials and Methods: This was a descriptive, retrospective study of odontogenic tumours diagnosed from January 2007 to December 2014 at this centre. The odontogenic tumours were classified using the 2005 World Health Organization classification system. Results: Among 2,733 biopsy specimens, 173 cases were diagnosed as odontogenic tumours (6.3%), of which 171 (98.8%) are benign and 2 (1.2%) are malignant. The most frequently encountered tumour was ameloblastoma (n=96, 55.5%), followed by keratocystic odontogenic tumour (KCOT) (n=38, 22.0%) and odontomas (n=16, 9.2%). Malignant tumours accounted for 1.2% of the tumours. Most ameloblastomas and KCOTs affected the mandible preferentially. The mean age was 33.5 (± 17.8) years and 64.7% of patients were in the age group of 10 to 39. Odontogenic tumours were slightly more common in males, with a male to female ratio of 1.4:1. Conclusion: The findings of this study are similar to the other studies in Asia in which the most common tumour encountered is the ameloblastoma, followed by KCOT. The most common signs and symptoms are pain and swelling, while paraesthesia and root resorption are less frequently reported. Such clinical and radiographic features should alert the clinician of a possible odontogenic tumour and though rare, malignant tumours should also be included in the differential diagnoses.

Tratamento cirúrgico de cementoblastoma assintomático em elemento hígido / Surgical treatment of asymptomatic cementoblastoma in higid element

O cementoblastoma benigno é uma lesão patológica rara, de origem odontogênica, caracterizada pela proliferação anormal de cementoblastos, o que forma, consequentemente, uma massa de tecido semelhante a cemento. Na maioria dos casos, é encontrado em associação com primeiros molares inferiores. Ocorre mais frequentemente em caucasianos, entre as 2ª e 3ª décadas de vida, afetando, assim, raramente dentes decíduos. Geralmente, apresenta sintomatologia dolorosa e expansão de corticais ósseas. Seu tratamento vai desde a remoção completa da lesão com extração do dente envolvido até o tratamento endodôntico com preservação do elemento dentário. No presente artigo, relata-se um caso de cementoblastoma benigno em uma paciente de 23 anos sem sintomatologia dolorosa e ao exame clínico nada de anormal foi observado, sendo tratada através da remoção da lesão e extração do dente... (AU)

The benign cementoblastoma is a rare pathologic wound, of odontogenic origin feature of the abnormal cementoblast proliferation, resulting hence a coat mass like to cement. Usually is found in association with the first bottom molars. This happen more frequently on Caucasian, between the 2ª and 3ª decade of life, affecting rarely the primary dentition . Generally show a painful symptomatic and expansion of the cortical bone. The treatment starts with the removal wound full of with the tooth extraction involved in the endodontico treatment , with preservations of the dental element. This article descrambles a cementobastoma benign case in a patient with 23 years old, asymptomatic and the clinic exam nothing abnormal was found. Was treated through the wound removal and the tooth extraction... (AU)

Calcifying Odontogenic Cyst of Mandible: A Case Report

The term calcifying odontogenic cyst was first introduced by Gorlin in 1962. It represents 2% of all odontogenic pathological changes in the jaw. The calcifying odontogenic cyst usually arises intraosseously, but it may also occur extraosseously, with about equal frequency in the mandible and maxilla (1:1). The age of the patients may range from 5 to 92 years, with peak incidence in the second and sixth decade of life. Radiographically, the lesion appears as a unilocular or multilocular well-defined radiolucency that may contain small irregular calcified bodies of varying sizes, and it may be associated with an odontome or an unerupted tooth. We present a case report of 17year-old female with Calcifying odontogenic cyst involving right body and angle of mandible.

Primary intra-osseous squamous cell carcinoma arising from an odontogenic cyst: a case report

Primary intra-osseous squamous cell carcinoma (PIOSCC) is a rare tumour which occurs centrally within the jaws. It is believed to arise from odontogenic epithelial remnants or from pre-existing odontogenic cysts/tumours. A case of PIOSCC arising from an odontogenic cyst in a 57-year-old female is discussed. Initial clinical and radiographic examination was suggestive of an odontogenic cyst / cystic tumour. The lesion was enucleated and sent for diagnostic histopathology which revealed the presence of an invasive carcinoma arising from the walls of the odontogenic cyst. The patient then underwent right mandibular resection and reconstruction as well as right supra-omohyoid neck dissection. Long standing odontogenic cysts have the potential to undergo malignant transformation though this may not always be the case. Relying only on radiographic findings for the management of cyst-like lesions without obtaining histopathological diagnosis is extremely ill-advised.

Keratocystic Odontogenic Tumour Admixed With Giant Cells: Case Report and Review on the Role of RANK/RANKL in its Pathogenesis

‘Odontogenic keratocyst’ (OKC) was the term coined by Philipsen in the year 1956, while Pindborg and Hansen in the year 1963 described the details of this cyst[1,2]. OKC is renamed as keratocystic odontogenic tumour (KCOT) by WHO[3] taking into view its aggressive and recurrent nature. OKC arises from the rests of dental lamina[1]. It can occur anywhere in the oral cavity wherever the osseous structures are present, but most commonly in the posterior regions of the mandible[2,4]. Since the clinical and radiological profile of OKC mimics other lesions it may affect the appropriate diagnosis. Here we report a case of aggressive OKC which affected an entire quadrant of the mandible along with the ramus.

Tumor odontogênico adenomatoide mimetizando um cisto radicular / Adenomatoid odontogenic tumour mimetizing a radicular cyst

O tumor odontogênico adenomatoide (TOA) foi considerado como uma entidade clínica distinta, em 1969, por Philipsen e Birn. Trata-se de um tumor odontogênico, de caráter totalmente benigno, assintomático, de crescimento lento e raramente atingindo tamanho maior que 3 cm. Acomete, preferencialmente, a região anterior dos ossos gnáticos, principalmente a maxila, ocorrendo duas vezes mais no gênero feminino, sendo incomum em pacientes maiores que 20 anos. O objetivo deste trabalho é relatar um caso clínico atípico de tumor odontogênico adenomatoide em região anterior de mandíbula, mimetizando cisto radicular, acometendo um paciente de 45 anos, do gênero masculino, tratado com enucleação cirúrgica. O paciente encontra-se atualmente em proservação, não apresentando sinais clínicos e imaginológicos de recidiva. No presente artigo, os aspectos clínicos, radiográficos e histológicos do tumor odontogênico adenomatoide serão discutidos assim como o tratamento recomendado... (AU)

Adenomatoid Odontogenic Tumor (AOT) was so classified as a new tumor in 1969 by Philipsen and Birn. This odontogenic tumor is benign, asymptomatic, has a slow growing and rarely reach a size greater than 3 cm. AOT usually occurs in anterior jaw bones, affects females twice more than males and is unusual in patients older than 20 years-old. The aim of this study is to report an atipic case of AOT in the anterior mandible mimetizing a radicular cyst, affecting a 45 years-old male patient, who was treated by surgical enucleation. The patient has been followed-up and has no clinical and imaging signs of recurrence. In this paper, adenomatoid odontogenic tumor's clinical, radiographic and histological aspects will be discussed, as well the recommended treatment... (AU)

Keratocystic Odontogenic Tumor of the Mandible – A Case Report

Odontogenic keratocyst has been renamed as KCOT (Keratocysticodontogenic tumour) by the World Health Organization in 2005. It is a benign intraosseous neoplasm of the jaw. They develop from the dental lamina remenants in the mandible and maxilla. KCOT is of particular interest because of its recurrence rate and aggressive behaviour. We are here presenting a case of KCOT in middle aged male patient.

Imaging diagnosis of keratocystic odontogenic tumour in mandible / 实用放射学杂志

Objective To discuss the X-ray and CT manifestations of keratocystic odontogenic tumour(KCOT)in mandible,to im-prove the diagnostic accuracy of the disease.Methods The X-ray and CT features of KCOT(n=25)in mandible,which were proved by surgery and pathology,were retrospectively analyzed.Results The KCOT,including solitary tumor(n=23)and multiple tumor (n=2),mainly displayed unilocular or multilocular in shape with distinct sclerosing margin.Disruption of the adjacent cortex was de-tected in 7 cases,growth along the long axis of mandible in 18 cases,compression and displacement of the adjacent teeth in 21 cases, resorption of bevel of roots in 2 cases.Conclusion Most lesions of KCOT in mandible have characteristic manifestation in X-ray and CT findings,which is helpful for diagnosis and differential diagnosis.

Analysis of the Neoplastic Nature of Odontogenic Keratocyst and its Comparison with other Selected Benign Odontogenic Tumours: An Immunohistochemical Analysis

Odontogenic keratocyst (OKC) first described by Philipsen in 1956 constitutes approximately 11% of all cysts of the jaws. Adenomatoid odontogenic tumour (AOT) is an uncommon, benign epithelial lesion of odontogenic origin. The aim of this study was to analyse the expression of Bcl-2 in OKC and its comparison with other selected benign odontogenic tumours (OTs). Ten formalin fixed paraffin embedded blocks of OKCs, five each of AOT and unicystic ameloblastoma Bcl-2 protein is characterized by its ability to inhibit apoptosis. OKC were characterized by higher expression of Bcl-2 in basal cell epithelium. AOT and unicystic ameloblastoma differed from OKC in a wide spectrum of apoptosis and/or cell cycle-related protein expressions, higher proliferation in the basal cell layer, and vice versa, lower proliferation in the suprabasal cell layer. The solitary OKC seems to be less biologically aggressive and should be classified as a cyst rather than a tumour, means that at least few of OKCs manifests as ordinary cysts. Some of the present study findings could support the theory that OKCs are with high proliferative, probably that these lesions are developmental cysts with some neoplastic properties because of the high intrinsic growth potential. WHO recommends the term KCOT as it better reflects the neoplastic nature of the lesion; however, this reclassification has not yet been universally accepted.

Calcifying Epithelial Odontogenic Tumor (Ceot).

Calcifying epithelial odontogenic tumor is a rare benign epithelial odontogenic lesion that comprises from 0.2% to 1.1 of all odontogenic tumors. In the past a number of different names have been given to this lesion, such as calcifying ameloblastoma, cystic complex odontoma, uncommon ameloblastoma with calcifications and others. There is a need to study and explore various aspects of this tumour, this article gives a broad idea of the various aspects of this tumor and which aspect of this tumour needs more investigation

Adenomatoid Odontogenic Tumour– A case report

Adenomatoid odontogenic tumour (AOT) is a benign, non-invasive odontogenic tumour with slow and sustained growth. It is relatively rare and unusual, and mainly affects females in their second decade of life, exhibiting predilection for the anterior region of the maxilla. The lesion is usually associated with the crown of an enclosed tooth, most commonly the maxillary canine. In this paper, we present a case of a 19-year-old female having the classical clinical, radiological and histopathological features, leading to the diagnosis of AOT.

Cementoblastoma benigno na mandíbula: Relato de caso / Benign cementoblastoma in mandible: a case report

O cementoblastoma benigno (CB) é um tumor odontogênico raro, de crescimento lento e ilimitado. Ocorre mais frequentemente em caucasianos, entre as 2ª e 3ª décadas de vida, sem predileção por gênero. Mais comum na mandíbula, área de molares e pré-molares, geralmente envolve o primeiro molar permanente. Em imagem radiográfica, apresenta massa radiopaca delimitada por delgada linha radioluscente, simulando uma hipercementose. Em cortes histológicos, assemelha-se fortemente com osteoma osteoide, osteosarcoma ou osteoblastoma benigno. O objetivo do presente trabalho foi descrever um caso incomum de cementoblastoma. I.D.S., gênero masculino, melanoderma, 32 anos que compareceu ao ambulatório do Grupo de Apoio Aprendizes do Amor Cristão - GAAAC, Brasília - DF, sem queixa de dor, portando lesão na região do 2º molar mandibular esquerdo, apresentando imagem radiográfica sugestiva de cementoblastoma. O tratamento consistiu na remoção completa da lesão acompanhada de extração do dente 37. Após dois anos, observou-se a remissão dos sinais, não havendo recorrência do tumor. O caso relatado apresentou como variante incomum ter acometido indivíduo da raça negra, relacionado ao 2º molar mandibular esquerdo - 3%. O sítio de localização atípico e as discrepâncias encontradas entre o presente relato e a literatura reforçam a importância do diagnóstico e a pesquisa por novas evidências relacionadas ao cementoblastoma.

The cementoblastoma benign (CB) is a rare odontogenic tumor, slow growth and unlimited. It occurs more frequently in caucasians, between 2nd and 3rd decades of life, with no predilection for gender. More common in the mandible area of molars and premolars, usually involving the first permanent molar. In radiographic image shows a radiopaque mass bounded by thin radiolucent line simulating a hypercementosis. Using histological resembles strongly with osteoid osteoma, osteosarcoma and benign osteoblastoma. The aim of this study was to describe an unusual case of cementoblastoma. IDS, male, melanoderma, 32 years old, came to the Grupo de Apoio Aprendizes do Amor Cristão - GAAAC, Brasília - DF, without pain, with a lesion in the 2nd left molar region, presenting radiographic image suggestive of cementoblastoma. The treatment consisted of complete removal of the lesion accompanied by the extraction of the tooth 37. After two years, there was remission of signs, with no tumor recurrence. This case presents unusual variant as the fact that it involved an individual of black, related to 2nd left mandibular molar - 3%. The rarity of the condition and the discrepancies found between this case and the literature of reinforce even more the importance of any new evidence related to cementoblastoma.

Expressão de MMPs, marcadores angiogênicos e proliferação celular em tumores odontogênicos / Expression of MMPs, angiogenic and proliferation cell markers in odontogenic tumors

INTRODUÇÃO E OBJETIVO: O conhecimento do comportamento biológico de lesões de natureza odontogênica é essencial para tornar a abordagem terapêutica adequada e estabelecer um prognóstico. A produção de metaloproteinases da matriz extracelular (MMPs), a angiogênese e a proliferação celular fornecem subsídios para o crescimento tumoral. O presente artigo tem como objetivo fazer uma revisão de literatura de pesquisas em tumores odontogênicos (TOs) selecionados a partir da nova classificação da Organização Mundial da Saúde (OMS) de 2005 sobre a expressão de MMPs, marcadores angiogênicos e proliferação celular e verificar, nestes estudos, a relação desses marcadores quanto ao comportamento biológico dessas lesões. RESULTADOS: Nota-se que as MMPs -1, -2, -7, -9 e -26 encontram-se mais expressas no componente epitelial e estroma e, particularmente, a -13 em estroma. Uma maior angiogênese é observada em TOs mais agressivos. CD 105 foi mais expresso no TO ceratocístico (TOC) e CD34 em ameloblastomas sólidos (ASs). Relata-se elevada expressão do Ki-67 e p53 no TOC e no AS e baixo índice de proliferação celular no TO adenomatoide (TOA). CONCLUSÃO: Esses resultados mostram que as MMPs participam no processo de invasão e recorrência de algumas lesões odontogênicas, estando associadas ao comportamento biológico desses tumores. A angiogênese é fundamental para fornecer suporte à proliferação celular e esses dois eventos em conjunto estão correlacionados com diferentes níveis de comportamento biológico nos TOs, quando comparados com cistos de natureza odontogênica, o que pode sugerir o uso de inibidores angiogênicos como provável abordagem terapêutica nessas lesões.

INTRODUCTION AND OBJECTIVE: The study of biological behavior of odontogenic lesions is essential to the establishment of appropriate therapeutic approach and prognosis. The production of extracellular matrix metalloproteinases (MMPs), angiogenesis and cell proliferation contribute to tumor growth. This paper aims to review the literature on odontogenic tumors (OT) selected according to the new World Health Organization classification (WHO- 2005) by evaluating the expression of MMPs, angiogenic and cell proliferation. Furthermore, it aims to verify the relation between these markers and the biological behavior of these lesions. RESULTS: it was found that MMPs -1, -2, -7, -9 and -26 had a higher expression in both epithelial component and stroma, and 13 particularly in the stroma. Increased angiogenesis was observed in more aggressive OT. CD105 expression was higher in keratocystic odontogenic tumour (KOT) and CD34 in solid ameloblastomas (SA). It was observed a higher expression of Ki-67 and p53 in SA and KOT and a low cell proliferation rate in the adenomatoid odontogenic tumour (AOT). CONCLUSION: These results show that MMPs are involved in invasion and recurrence of some odontogenic lesions and are associated with the biological behavior of these tumors. Angiogenesis is critical to provide support to cell proliferation and these concomitant events are correlated with different levels of biological behavior in OT when compared to odontogenic cysts, hence the use of angiogenic inhibitors may be a potential therapeutic approach in these lesions.

Cisto odontogênico ortoqueratinizado x tumor odontogênico queratocístico: a importância da diferenciação histopatológica no tratamento / Orthokeratinized Odontogenic Cyst x Keratocystic Odontogenic Tumour: The Importance of Differential Histopathogenesis in the Treatment

O cisto odontogênico ortoqueratinizado (COO) e o tumor odontogênico queratocístico (TOQ) são lesões distintas, com comportamento clínico e características radiográficas semelhantes. Enquanto o COO é classificado como cisto odontogênico, o TOQ, com base na última classificação da OMS em 2005, passou a ser classificado como neoplasia odontogênica. Essa alteração realizada na classificação do TOQ baseou-se em evidências científicas que constataram uma taxa de proliferação celular dessas lesões não compatível com as lesões císticas, fato esse comprovado mediante os dos elevados índices de recidiva encontrados no TOQ. Em função das semelhanças clínicas e radiográficas, a diferenciação histológica dessas lesões torna-se preponderante para o delineamento de um plano de tratamento conservador ou agressivo. Neste trabalho, relata-se um caso de paciente com 28 anos, gênero masculino, leucoderma, com aumento de volume assintomático em mandíbula, na região dos dentes 33, 34 e 35, todos com vitalidade. Os exames de imagem revelaram lesão radiolúcida em parasínfise e corpo mandibular esquerdo. O paciente foi submetido à punção aspirativa, com resultado negativo, e à biópsia incisional. O material coletado foi enviado a um laboratório de anatomopatologia cujo laudo revelou tumor odontogênico queratocístico. Assim sendo, o paciente foi submetido à cirurgia de enucleação com curetagem marginal, evoluindo sem intercorrências no pós-operatório. O material coletado durante a enucleação foi encaminhado ao laboratório de Patologia Bucal da Faculdade de Odontologia de São José dos Campos - UNESP cujo laudo mostrou lesão cística revestida por epitélio ortoqueratinizado compatível com cisto odontogênico ortoqueratinizado, contradizendo o resultado obtido na biópsia incisional. Atualmente, o paciente encontra-se em proservação há 72 meses, sem indícios de recorrência lesional.

The orthokeratinized odontogenic cyst (OOC) and keratocystic odontogenic tumour (KCOT) are distinct lesions with similar clinical behavior and radiological features. According to the latest edition of the WHO classification, the KCOT is now classified as an odontogenic neoplasm and the OOC continuesto be classified as an odontogenic cyst. This change made in the classification of KCOT was based on scientific evidence that demonstrated that the proliferation rate of these lesions is not compatible with cystic lesions, a fact demonstrated by the high rate of recurrence found in KCOT. Due to their clinical and radiological similarities, the histological differentiation of these lesions is crucial when choosing whether to adopt a conservative or invasive plan of treatment. In this paper, we describe a 28-year-old male patient, caucasian, with asymptomatic increased volume in the mandible in the region of teeth 33, 34 and 35, all with vitality. The imaging studies revealed a radiolucent lesion in the left mandibular body and parasymphysis. The patient underwent aspiration with negative results and incisional biopsy. The material collected was sent to an anatomic pathology laboratory, and the report revealed a keratocystic odontogenic tumour. The patient therefore underwent a surgical enucleation with marginal curettage, with an unremarkable postoperative course. The material collected during the enucleation was sent to the Oral Pathology Department at the School of Dentistry, São José dos Campos - UNESP, whose report revealed a cystic lesion lined by orthokeratinizing epithelium compatible with an orthokeratinized odontogenic cyst, which was at odds with the result obtained in the incisional biopsy. The patient has been followed up for 72 months with no evidence of recurrence of the lesion.

Extensive complex odontoma in the maxillary sinus: an uncommon presentation as a cause of chronic sinusitis / Extenso odontoma complexo em seio maxilar: uma apresentação incomum como causa de sinusite crônica

PURPOSE: This study reports a case of a extensive odontoma causing maxillary sinusitis. CASE DESCRIPTION: A 25-year-old man at clinical examination revealed discrete facial asymmetry and exposure of the lesion in the oral cavity. Imaging exams showed the presence of a well-defined radiopaque mass in the left maxilla, measuring approximately 7 cm and was intimately associated with the maxillary sinus and oral cavity. The mass was excised through an intraoral access under general anesthesia in the hospital and sent for histopathology, which was diagnosed as complex odontoma. The patient is under clinical follow-up and shows no signs of maxillary sinusitis and no oral sinus fistula. CONCLUSION: The odontoma is a common injury in clinical dentistry, but in some aggressive cases may cause sequelae in the patient, thus, caution the dentist for proper diagnosis and treatment.

OBJETIVO: Este estudo relata a apresentação de um extenso odontoma causando sinusite maxilar. DESCRIÇÃO DO CASO: Um homem de 25 anos ao exame clínico revelou assimetria facial discreta e exposição da lesão na cavidade oral. Os exames de imagem mostraram a presença de uma massa radiopaca bem definida na maxila esquerda, medindo aproximadamente 7 cm e estava intimamente associado com o seio maxilar e a cavidade oral. A massa foi extirpada através de um acesso intra-oral, sob anestesia geral em ambiente hospitalar e enviada para estudo histopatológico, onde foi diagnosticada como odontoma complexo. O paciente está sob acompanhamento clínico e não mostra sinais de sinusite maxilar e fístula bucossinusal. CONCLUSÃO: O odontoma é uma lesão comum na clínica odontológica, mas pode, em alguns casos, se apresentar de forma agressiva levando a danos ao paciente, e desta forma, é necessária atenção do cirurgião dentista para o correto diagnóstico e tratamento.

Adenomatoid odontogenic tumour - an unusual extrafollicular variant of the posterior mandible.

Adenomatoid odontogenic tumor (AOT) is a relatively uncommon distinct odontogenic neoplasm. Although this lesion was formerly considered to be the variant of ameloblastoma, its clinical features and biologic behavior indicate, that it is a separate entity. It is a tumor of odontogenic epithelium with duct like structures and with varying degrees of inductive change in the stroma. It is a benign and slow growing tumor which is usually located in the anterior region of the maxilla without pain, and represents 3% of all odontogenic tumors. Most adenomatoid odontogenic tumors (AOTs) occur intra-osseously. They surround the crowns and are attached to the necks of unerrupted teeth in a true follicular relationship, whereas the extrafollicular type has no relation with an impacted tooth, and the peripheral variant is attached to the gingival structures. The aim of this paper is to present a rare case of an extrafollicular AOT occurring in the posterior aspect of the mandible which is distinct

Pindborg Tumor in an Adolescent- An Atypical Presentation.

Calcifying epithelial odontogenic tumor (Pindborg tumor), is a rare benign odontogenic neoplasm representing about 0.4-3% of all odontogenic tumors. This tumor more frequently affects adults in an age range of 20- 60 years, with a peak incidence in the 5th decade of life. Calcifying epithelial odontogenic tumour has a much lower recurrence rate than ameloblastoma and malignant transformation with metastasis is rare.

Tumor odontogênico adenomatóide associado a cisto dentígero: relato de um caso incomum / Adenomatoid odontogenic tumour associated with dentigerous cyst: unusual case report

O tumor odontogênico adenomatóide é uma lesão relativamente incomum, que acomete preferencialmente indivíduos do sexo feminino durante a segunda década de vida, exibindo como sítio de predileção a região anterior da maxila. A lesão geralmente está associada à coroa de um dente incluso, comumente o canino. Neste trabalho é relatado o caso de um tumor odontogênico adenomatóide associado a cisto dentígero ocorrendo na região maxilar esquerda, em paciente do sexo feminino com 13 anos de idade, discutindo-se, ainda, as características clínicas, radiográficas, histopatológicas e terapêuticas do caso.

The adenomatoid odontogenic tumor is a relatively uncommon lesion which mainly affects females in their second decade of life, exhibiting predilection for the anterior region of the maxilla. The lesion is usually associated with the crown of an enclosed tooth, most commonly the maxillary canine. In this paper we present a case of adenomatoid odontogenic tumor associated with a dentigerous cyst affecting the left maxillary region in a 13-year-old female. The authors also discuss clinical, radiographic, histopathologic and therapeutic features of the case.