Search results for "odontogenic tumor"
showing 10 items of 72 documents
Clear cell variant of calcifying epithelial odontogenic tumor: case report with immunohistochemical findings
2015
Calcifying epithelial odontogenic tumor (CEOT) is a rare benign odontogenic neoplasm, locally aggressive, characterized by sheets and nests of polyhedral epithelial cells exhibiting eosinophilic cytoplasm or less often clear cytoplasm. Additional features include nuclear pleomorphism without mitotic activity, concentric calcifications, and deposits of amyloid. Herein, we present an additional example of clear cell variant of CEOT occurring in a 25-year-old female. Microscopically, the tumor consisted on proliferation of epithelial cells with eosinophilic, clear vacuolated cytoplasm interspersed with focal areas of amyloid deposition. Tumor cells were immunopositive for AE1/AE3, CK14, CK19, …
Unicystic ameloblastoma in 3 year old paediatric patient: a rare entity
2013
Unicystic ameloblastoma (UA) is a benign epithelial odontogenic tumor of the jaws that commonly occurs in 2nd and 3rd decade of life. In fact, this entity is rare in children under 12 years of age. It is characterised as a distinct variant of ameloblastoma, exhibiting a less aggressive behaviour and a lower rate of recurrence than solid conventional ameloblastoma. There are very few reported cases of UA occurring in children below five years of age. The purpose of this case report is to describe a case of UA involving the crown of an unerupted maxillary second premolar in a 3 year old girl. The pathogenesis, clinical appearance, radiographic presentation, histological findings and managemen…
Percutaneous tracheostomy in COVID patients. Experience in our hospital center after one year of pandemic and review of the literature
2021
Background The pandemic caused by SARS-COV-2 has caused an increase in the need of tracheostomies in patients affected with respiratory distress syndrome. In this article we report our experience during a year of pandemic, we develop our surgical technique to perform percutaneous tracheostomy with the patient in apnea and we compare our results with those of other centers through a bibliographic review. Material and Methods A one-year retrospective clinical study was carried out on tracheotomies performed on patients admitted to the intensive care unit with severe SARS-CoV-2, with difficulty for ventilation or weaning. The technique performed was percutaneous, with fibroscopic control throu…
Analyses of odontogenic tumours : the most recent classification proposed by the World Health Organization (2017)
2020
Background The fourth edition of the ‘’WHO Classification of Head and Neck Tumours’’ was published in January 2017 and includes a classification of odontogenic tumours. This review aims to examine the changes made in this new classification in comparison with the previous classification of 2005. Material and Methods An electronic search was conducted in the PubMed, Scopus and Cochrane databases with the keywords “odontogenic tumor”, “WHO classification” and “update”. Studies published from January 2009 to April 2019 with a high level of scientific evidence were included, but studies not published in English, epidemiological studies and studies with a low level of evidence were excluded. Res…
Surgical management of ameloblastoma. Review of literature
2019
Background Ameloblastoma is an odontogenic tumor that represents 1% of all tumors in the oral cavity and it is clinically classified in three types. Currently, solid and multi-cystic are considered locally aggressive, with high recurrence rates with conservative treatment. Material and methods Objective of the present review is to assess whether the surgical treatment should be conservative or radical. English articles published between 2009-2014, with available summary and in humans were included. Results 241 articles were found, 188 were excluded because analyzing. 53 articles were analyzed and finally 14 were selected for this review. Conclusions The optimal surgical treatment of amelobl…
Cysts and tumors of the jaws treated by marsupialization: A description of 4 clinical cases
2019
Since the 4th edition of the World Health Organization's Classification of Head and Neck Tumours was published in January of 2017, the keratocystic odontogenic tumor is back into the cyst category as odontogenic keratocyst (OKC). Depending on the size of the cyst, its location and the patients' age, several treatment options are available: curettage, enucleation, radical treatment and marsupialization. The marsupialization is a conservative technique used in early tumor stages, as curative treatment for the odontogenic cyst. Despite its disadvantages and controversies, the marsupialization remains an interesting therapeutic choice in the case of large cysts, or in very young or old patients…
Role of carnoy’s solution in the treatment of keratocystic odontogenic tumor: A systematic review
2016
Introduction and Objective The keratocystic odontogenic tumor is a benign but aggressive neoplasm. As enucleation alone obtains high recurrence rates, some adjuvant treatments such as Carnoy’s solution have been proposed. The aim of this study is to evaluate the reduction of recurrences with the use of Carnoy’s solution as adjuvant in the treatment of keratocystic odontogenic tumors. Material and Methods An electronic search in Pubmed (MEDLINE), ScienceDirect and Cochrane databases was conducted with the key words “odontogenic keratocyst”, “keratocystic odontogenic tumor”, “carnoy’s solution”, “treatment” and “enucleation”. The inclusion criteria were clinical studies using Carnoy’s solutio…
Simple bone cyst : description of 60 cases seen at a Brazilian School of Dentistry and review of international literature
2020
Background The aim of this study was to describe the relative frequency and the main demographic and clinic-radiographic features related to patients diagnosed with Simple bone cyst (SBC) in an Oral Diagnosis Service in Southeast Brazil and present a review and discussion of international literature on this topic. Material and Methods SBC cases from our service encompassing the period between 1978 and 2017 were selected. In addition, a literature search was performed in the Pubmed/MEDLINE online electronic database published between 1951 and 2019. Results A total of 2,459 cystic lesions were documented in our service, thus 60 patients were diagnosed with the SBC representing 2.4% of all jaw…
Tumor odontogenico adenomatoide folicular: Estudio inmunohistoquimico
2006
El tumor odontogénico adenomatoide (TOA) es una infrecuente lesión odontogénica benigna, que aparece en pacientes jóvenes, generalmente mujeres en la segunda década de la vida, a menudo como una lesión radiolúcida de aspecto quístico unilocular, en asociación a un diente, usualmente canino, no erupcionado. A pesar de haberse denominado también adenoameloblastoma o tumor ameloblástico adenomatoide, el TOA es una lesión benigna con una muy baja tendencia a la recidiva, mostrando una morfología muy peculiar (apariencia basaloide con estructuras glanduliformes, calcificaciones esferulares, presencia de material amiloide) que facilitan su reconocimiento histológico. Se presenta un análisis clíni…
Immunohistochemical analysis of the patterns of p53 and PCNA expression in odontogenic cystic lesions
2008
Objective: the role of p53 expression in odontogenic lesions has not been fully determined, but has been associated with cell proliferation. The purpose of this study was to analyze p53 and proliferating cell nuclear antigen (PCNA) expression in 4 different odontogenic lesions. Design: expression of p53 and PCNA was analyzed in radicular and dentigerous cysts, odontogenic keratocysts, and calcifying odontogenic cysts (Gorlin cysts) using monoclonal antibodies for detection of p53 and PCNA. Results: PCNA expression was significantly greater in the basal layer of radicular cysts and in the suprabasal layer of odontogenic keratocysts; the percentage of p53 positive cells was significantly grea…