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O cisto periodontal apical representa a patologia de natureza inflamatória mais comum entre os cistos odontogênicos, correspondendo a cerca de 60% dos cistos da maxila e mandíbula. Está associado ao ápice de um dente desvitalizado e geralmente é assintomático, acometendo com mais frequência a região anterior da maxila. Paciente 44 anos, leucoderma, apresentou uma lesão de grande proporção assintomática localizada em região anterior da maxila. Ao exame clínico foi possível observar aumento de volume associado ao apagamento do sulco gengivolabial, além de teste de vitalidade pulpar negativo nas unidades dentárias #13, #12, #11, #21 e #22. Radiograficamente, apresenta-se como uma imagem radiolúcida unilocular bem definida circundando os ápices das respectivas unidades dentárias. Foi realizada uma punção aspirativa, evidenciando secreção piossanguinolenta, reforçando a suspeita diagnóstica de cisto periodontal apical. Foram realizadas duas punções aspirativas por semana, durante duas semanas, seguidas de injeção intralesional de Rifocina. Após a quarta sessão, foi realizada abordagem cirúrgica para enucleação da lesão. A radiografia panorâmica pós-operatória de 45 dias evidenciou neoformação óssea. Desta forma, é possível constatar que a abordagem cirúrgica consiste em uma opção terapêutica resolutiva, principalmente em lesões extensas.

ResumoObjetivoO objetivo desse estudo foi conhecer o perfil epidemiológico dos pacientes diagnosticados com quistos odontogénicos (QO) numa universidade particular de odontologia, num período de 8 anos.MétodosUm estudo retrospectivo foi realizado através da análise dos registros dos diagnósticos histopatológicos. Foram pesquisados os seguintes dados: género, idade, localização anatómica, tipo de quisto e história pregressa.ResultadosForam encontrados 158 casos, com predomínio de pacientes do género feminino (50,6%) com idade até 60 anos (88,6%) e história pregressa ao diagnóstico igual ou maior que 6 meses (17,7%). Com relação à localização anatómica, a maxila foi a região mais prevalente (47,5%). Foram encontrados 58 (36,7%) QO de desenvolvimento e 100 (63,3%) QO inflamatórios. Os QO mais prevalentes foram o quisto periodontal apical (57%) e o quisto dentígero (34,8%). Os resultados destacam uma maior prevalência de QO de etiologia inflamatória na maxila e em pacientes do género feminino com 60 anos ou menos.ConclusãoO perfil epidemiológico dos QO observado na presente investigação foi semelhante ao encontrado em outras populações, havendo discreto predomínio do género feminino e diferença em relação à localização anatómica.AbstractObjectiveThis study aimed to investigate the epidemiological profile of diagnosed odontogenic cysts (OCs) in patients of a private dentistry university over an 8‐year period.MethodsWe retrospectively analyzed the following characteristics from the histopathological records of patients: gender, age, anatomic location, type of cyst, and patient history.ResultsWe identified a total of 158 cases, showing a female predominance (50.6%), largely affecting patients younger than 60 years (88.6%), and with a lesion evolution time of ≥6 months (17.7%). The maxilla was the most prevalent anatomic location for OCs (47.5%). Further, of the 158 OC cases, 58 (36.7%) were developmental OCs and 100 (63.3%) were inflammatory OCs. The most prevalent types of OCs were apical periodontal cysts (57%) and dentigerous cysts (34.8%). Thus, our results have highlighted a higher prevalence of inflammatory OCs occurring in the maxilla, predominantly affecting female patients younger than 60 years.ConclusionThe epidemiological profile of OCs observed in this study was similar to that observed in different populations, with a discrete predominance of females and discrepancies regarding anatomic location.

Radicular cyst is the most common odontogenic cystic lesion of inflammatory origin. It is also known as periapical cyst, apical periodontal cyst, root end cyst, or dental cyst. It arises from epithelial residues in the periodontal ligament as a result of inflammation. The inflammation usually follows the death of dental pulp. This paper presents a case report of a patient with radicular cyst associated with a primary molar.

Aim: The purpose of the present study was to evaluate the correlation between clinical and histopathological diagnoses of periapical inflammatory lesions, focusing mainly on cystic conditions. Methods: Files dating from 1998 to 2006 at the Oral Pathology Laboratory, School of Dentistry, Alfenas Federal University, Brazil, were reviewed to identify cases with histopathological diagnoses of periapical inflammatory lesions. A total of 1788 files were analyzed, and 255 cases were identified with clinical diagnoses of periapical inflammatory lesions. Results: The most prevalent clinical diagnosis was apical periodontal cyst (59%), followed by periapical granuloma (20%), and dentoalveolar abscess (2%). After histopathological analysis, 53% of the cases represented apical periodontal cyst, 42% periapical granuloma, and 5% dentoalveolar abscess. Conclusions: The outcomes of the present study show a high prevalence of periapical cysts among periapical inflammatory lesions. Moreover, this study highlights the importance of histopathological evaluation for the correct diagnosis of periapical inflammatory lesions.

Made available in DSpace on 2015-12-07T15:30:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2011. Added 1 bitstream(s) on 2015-12-07T15:54:06Z : No. of bitstreams: 1 PMC3886068.pdf: 1262503 bytes, checksum: f0895fd7d254fabb4f3fc3fca13b5744 (MD5) The lateral periodontal cyst is considered a developmental odontogenic cyst with unusual occurrence. In most cases it is preliminary diagnosed as a radiographic finding, presenting as well circumscribed or as a round or teardrop-shaped radiolucent area. Due to its location it can easily be misdiagnosed as a lesion of endodontic origin. Final diagnosis should be based on histopatological examination. The purpose of this paper is to report a classic case of lateral periodontal cyst located in the anterior region of mandible and to review the relevant literature which describes the clinical, radiological and histopathological features of lateral periodontal cysts. A 50 years female patient complained of an asymptomatic gingival swelling in the region between the left mandibular lateral incisor and canine. Radiographic examination revealed a well circumscribed radiolucency with approximately 0.5 cm diameter with a radiopaque margin between the roots of the left mandibular lateral incisor and canine. The adjacent teeth had vital pulp. A total enucleation of the lesion was performed, and intraoperative examination showed a single lesion with no communication between the cyst's cavity and the oral environment. Histological examination revealed that the lesion was lateral periodontal cyst of developmental origin. There was no recurrence or complications for 24 months follow-up. The lateral periodontal cyst can be considered in the differential diagnosis when a radioloucent lesion appears adjacent to the roots of vital teeth. The treatment of choice is surgical removal and subsequent histological evaluation to confirm the diagnosis. Relapses are infrequent. Postgraduation Program in Oral Biopathology, São José dos Campos Dental School, São Paulo State University - UNESP, São José dos Campos, São Paulo, Brazil and Postgraduation Program in Nanosciences and Advanced Materials, Federal University of ABC Santo André, São Paulo Brazil. Postgraduation Program in Oral Biopathology, São José dos Campos Dental School, São Paulo State University - UNESP São José dos Campos, São Paulo Brazil. Department of Biosciences and Oral Diagnosis, São José dos Campos Dental School, São Paulo State University - UNESP São José dos Campos, São Paulo Brazil. Postgraduation Program in Oral Biopathology, São José dos Campos Dental School, São Paulo State University - UNESP, São José dos Campos, São Paulo, Brazil and Postgraduation Program in Nanosciences and Advanced Materials, Federal University of ABC Santo André, São Paulo Brazil. Postgraduation Program in Oral Biopathology, São José dos Campos Dental School, São Paulo State University - UNESP São José dos Campos, São Paulo Brazil. Department of Biosciences and Oral Diagnosis, São José dos Campos Dental School, São Paulo State University - UNESP São José dos Campos, São Paulo Brazil.

Mucoepidermoid carcinoma arising centrally within the jaws is a rare lesion which exhibits considerable histologic variability and an unpredictable clinical course. Its specific pathogenesis is unknown, although speculation has centered on the pluripotential capabilities of the epithelial lining of odontogenic cysts. The case presented here illustrates the relationship of such a lesion arising from the cyst wall of an apical periodontal cyst.

The general aspects of Darier-White's disease have been discussed, with a detailed description of the associated mucosal lesions. We have presented reports of four patients with generalized skin involvements, three of whom also had oral lesions. We have also described certain unusual findings in association with the dental tissues, involving hyperplastic and metaplastic changes seen in the rests of Malassez, which probably resulted from Darier-White's disease. No equivalent epithelial changes, however, were observed in an apical periodontal cyst associated with a grossly carious tooth which was examined.

A rare case of multiple oral foci of metastatic melanoma in a 23-year-old man is presented. A unique aspect is the metastasis of a malignant neoplasm to the wall of an apical periodontal cyst.