A multi-centre evaluation of malignant odontogenic tumours in Nigeria (original) (raw)
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Pan African Medical Journal, 2015
Introduction: malignant odontogenic tumours (MOTs) are relatively rare tmours and only few cases have been reported in the sub-Sahara African literature. The aim of this study was to describe the demographic distribution of malignant odontogenic tumours in two tertiary health centres based on the current WHO 2005 classification scheme. Methods: we reviewed 21 malignant odontogenic tumours out of a total of 374 odontogenic tumours from two Tertiary Health Centres. Information regarding histology, location, patients age and gender for MOTs were analysed using SPSS for Windows (version 20.0; SPSS Inc. Chicago, IL). Results: twenty one (5.6%) MOTs out of a total of 374 odontogenic tumours were seen from the two institutions over the study period. The median age for MOTs was 42.0 (±19.0) years (range = 16-66 years). The male: female ratio was 2.5:1 and 85.7% occurred in the mandible. Ameloblastic carcinoma (AC) with 13 (61.9%) cases was the most common MOT. AC had a mean age of 37.5 (±11.9) years. AC had a mandible: maxilla ratio of 5.5:1 with majority (84.6%) occurring in the posterior mandible. Conclusion: this study showed that MOTs are rare lesions. AC was the most common MOT and majority of MOTs occurred in the posterior mandible of male patients. The study helps to better elucidate the demography of MOTs in sub-Sahara Africans.
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 2018
Objectives: Odontogenic tumours (ODTs) are a heterogeneous group of lesions derived from elements of the tooth-forming tissues. There are no published detailed data on the incidence of odontogenic tumours in the UK. Aim: to retrospectively describe the range and incidence of odontogenic tumours from 1992-2016 in a single specialist unit and to compare this with other populations. Study Design: Using the Oral and Maxillofacial Pathology database, Sheffield, both local and referred consultation cases were included. A proportion of diagnoses were reclassified in accordance with the 2017 WHO classification. Results: In total, 559 odontogenic tumours were diagnosed. Overall, the most common lesions were ameloblastoma (196; 33.8%), odontome (148; 25.5%) and odontogenic myxoma (37; 6.3%), but this varied between local and referral case populations, with odontomes most common in the local population (43%). The sites affected, gender and age of patients were similar to other western populations. Malignant ODTs comprised 33 cases (5.7%), of which nine (27.3%) were ameloblastic carcinoma. The majority of the malignant ODTs were referral cases. Conclusions: These are the first detailed data on odontogenic tumours within a UK population and the pattern of incidence from the local population is similar to other western populations. The exceptional rarity of malignant ODTs emphasises the need for specialist centres in order to gain diagnostic experience.
Clinico-pathological study of malignant odontogenic tumours from a national referral centre
BMC Oral Health
Background Malignant odontogenic tumours are extremely rare tumours occurring within the jaws. Our study was performed to determine the demographic and clinico-pathological features of malignant odontogenic tumours amongst a multi-ethnic Asian population. Methods This was a retrospective cross-sectional study of malignant odontogenic tumours diagnosed at the Institute for Medical Research, Malaysia, from 2009 to 2019. All cases were independently reviewed and reclassified following the criteria set out in the latest edition of the World Health Organization 2017 reference text. Demographic and clinico-pathological data were recorded for each case. Results Twenty-four cases of malignant odontogenic tumours were identified. The patients’ age ranged from 16 to 79 years with the mean age at diagnosis being 50.8 years (SD = 16.18). There was a male predominance (66.7%) in this cohort of patients. The ethnic distribution appeared to reflect the Malaysian population with most cases seen amo...
Controversies in Odontogenic Tumours: Review
Sultan Qaboos University medical journal, 2017
Odontogenic tumours are lesions that occur solely within the oral cavity and are so named because of their origin from the odontogenic (i.e. tooth-forming) apparatus. Odontogenic tumours comprise a variety of lesions ranging from non-neoplastic tissue proliferations to benign or malignant neoplasms. However, controversies exist regarding the pathogenesis, categorisation and clinical and histological variations of these tumours. The recent 2017 World Health Organization classification of odontogenic tumours included new entities such as primordial odontogenic tumours, sclerosing odontogenic carcinomas and odontogenic carcinosarcomas, while eliminating several previously included entities like keratocystic odontogenic tumours and calcifying cystic odonogenic tumours. The aim of the present review article was to discuss controversies and recent concepts regarding odontogenic tumours so as to increase understanding of these lesions.
Odontogenic tumours in Nigeria: A multicentre study of 582 cases and review of the literature
Medicina Oral Patología Oral y Cirugia Bucal, 2018
Background: The objective of this study was to classify the various types of odontogenic tumours (OTs) using the newly updated 2017 world health organization (WHO) histological typing and to analyze the prevalence of these tumours among Nigerians as well as to compare the results obtained with reports from worldwide studies. Material and Methods: The records of four major tertiary hospitals in Nigeria were reviewed over a 12-year (2004-2015) period. Lesions diagnosed as odontogenic tumours were classified into four groups according to the 2017 WHO histological typing. Data which consisted of age, sex and site were analyzed using SPSS for Window (version 20.0; SPSS Inc., Chicago, IL) and frequency tables were computed. Results: A total of 582 OTs were recorded and reviewed, benign OTs were 573 (98.5%) cases and malignant OTs were 9 (1.5%) cases. Of the benign OTs, the epithelial OTs were the commonest (500; 86%) while the benign mixed OTs were the least frequent (21; 3.6%). The mean age was 30±14 years (age range of 3-77years) and the peak age was in the third decade (197; 33.8%) of life. There was slight male gender and strong mandibular site predilection. Ameloblastoma, was the most frequent OT and it accounted for 75.5% of the OTs, followed by adenomatoid odontogenic tumour (8.1%) and odontogenic myxoma (7.2%). Malignant OTs accounted for 1.5% of the OTs.
Medicina Oral Patología Oral y Cirugia Bucal, 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. Results: The initial search found 457 articles and after eliminating duplicates, 8 studies were selected for full-text assessment. After excluding 3 epidemiological studies, 5 articles were finally included. These studies were stratified by their level of scientific evidence using SORT criteria (Strength of Recommendation Taxonomy). Conclusions: The new odontogenic tumour list has been simplified with the objective of improving its role as an international guide for diagnosis. Some changes have been possible thanks to the application of immunohistochemistry and molecular genetic techniques that allow better characterization of certain tumours. Further clinicopathological and molecular studies are needed so that this new classification can be consolidated and/or amended.
2016
Background: Tumours of odontogenic origin (OTs) resulting from epithelial and mesenchymal elements that are part of the tooth-forming apparatus must be considered as a differential diagnosis when analysing jaw lesions. They may be cystic, myxomatous or sometimes have a mixture of cystic and solid areas. Objective: To analyse the OTs seen at the Maxillofacial Surgery Department, Ahmadu Bello University Teaching Hospital, Zaria, Nigeria, between 2001 and 2013 based on the World Health Organization’s 2005 classification of OTs. Methods: A retrospective search and analysis was conducted of the medical records of all patients with a histopathologic diagnosis of orofacial tumours and tumour-like lesions seen at the Maxillofacial Surgery Department, Ahmadu Bello University Teaching Hospital, Zaria, Nigeria, from 2001 to 2013. Results: Odontogenic tumours constituted 179 (15.3%) cases out of a total of 1170 orofacial tumours and tumour-like lesions seen within the study period. The 179 OTs ...
Odontogenic tumors: An 11‐year international multicenter study
Oral Diseases, 2020
Cases of OTs were selected and classified according to the current WHO classification (2017) (Wright and Vered, 2017). The hematoxylin and eosin-stained sections were re-evaluated. Data regarding histopathological type, gender, age and anatomical site, were obtained from patient records. The cases of OTs were divided according to the oral pathology center and its corresponding geographical areas. Based on the 10-year analysis, Brazil 1 was the center with the highest number of cases of OTs (437 cases), followed by Israel (163 cases), Finland (115 cases), and Brazil 2 (108 cases).
Odontogenic tumors in Ethiopia: eight years retrospective study
BMC Oral Health, 2017
Background: Odontogenic tumor (OT) comprises a large heterogeneous group of lesions arising from tooth producing tissues or its remnants. Studies on OTs are scarce in Ethiopia. Thus, the present study aimed to assess the pattern of OTs in Ethiopia. Methods: An 8 years retrospective study was conducted at the Dental and Maxillofacial Department, St. Paul's referral hospital, Addis Ababa, Ethiopia. Data were collected by reviewing the medical records of patients who visited the Department from September 2008 to August 2015. All the collected data were coded, checked, edited and entered to SPSS windows 18. Lastly, descriptive statistics, and logistic regression were performed for data analysis. Results: A total of 448 patient's socio-demographic, and clinical data were reviewed from the registry book of patients diagnosed with OT. Of these, only 163 patient's records were complete and suitable for the study. 88 (54%) of the study subjects (163) were males, while the remaining 75 (46%) were females. The mean age of patients was 34, ranging between 8 and 80 years. 132 (81.0%) of the OTs were benign, and the rest 31 (19.0%) were malignant type. 126 (77.3%) of OTs occurred in the mandible, and the remaining 37 (22.3%) were located in the maxilla. 135 (82.8%) of the patients had primary surgical treatment. Continuity defect, facial disfigurement and malocclusion were the most frequently encountered complications after surgery. Living in rural areas showed statistically significant association with complication after surgery [Adjusted OR = 2.13, (95% CI: 0.98, 4.6)]. In addition, tumor size had statistically significant association with complication after surgery [Adjusted OR = 4.24, (95% CI: 1.76, 10.21)]. Conclusion: OTs were mainly found in males than their females counterpart. Benign OT was predominant over malignant OTs. Regular checkup and/or visit to dentists could help early case detection, and management of OTs.