Ectodermal odontogenic tumours: analysis of 197 Nigerian cases

Adebiyi, Kehinde Emmanuel; Odukoya, Onatolu; Taiwo, E O

doi:10.1016/j.ijom.2004.01.021

Cited by 23 publications

(26 citation statements)

References 22 publications

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“…15 Overall, ameloblastoma was the most predominant lesion (36.3%) and it accounted for 53 (80.3%) out of the 66 odontogenic tumors (OT) observed in this series. The observed prevalence of 80.3%, while comparable to the 83.3% obtained by Adebiyi et al from Lagos, Nigeria 16 is much higher than results of similar studies from Nigeria. 2,17,18 Our observed prevalence of ameloblastoma (n=53; 80.3%) in our 11 year study period was comparable to that of Adebayo et al 10 (n=12; 80%) recorded in a period of 5 years from the same geopolitical zone in southern Nigeria.…”

Section: Discussionsupporting

confidence: 75%

“…The predilection for the mandible as well as the age and gender distribution is consistent with reports in the literature. 16,23,24 In line with the recent WHO criteria 11 odontogenic keratocysts categorized as odontogenic tumor (Keratocystic odontogenic tumor ( KCOT) was the next most common lesion (8.2%) after ameloblastoma across the series. This is contrary to the findings in some studies where KCOT were reported as the most prevalent OT in studies that used the 2005 WHO classification.…”

Section: Discussionmentioning

confidence: 94%

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Maxillofacial Tumors and Tumor-like Lesions in a Nigerian Teaching Hospital: an eleven year retrospective analysis

Bassey¹,

Osunde²,

Anyanechi³

2014

Afr H. Sci.

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Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 94%

Maxillofacial Tumors and Tumor-like Lesions in a Nigerian Teaching Hospital: an eleven year retrospective analysis

Bassey¹,

Osunde²,

Anyanechi³

2014

Afr H. Sci.

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“…Adebiyi et al 14 analyzed 197 Nigerian cases of odontogenic tumour and reported that 15 cases (7.6%) were malignant. Ameloblastic carcinoma was the most prevalent malignant tumour, with 11 cases (5.6%); primary intraosseous carcinoma, with only 3 cases (1.5%), was next.…”

Section: Discussionmentioning

confidence: 99%

Low-Grade Spindle-Cell Ameloblastic Carcinoma: Report of an Unusual Case with Immunohistochemical Findings and Review of the Literature

et al. 2010

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carcinomas. Only in the updated who classification of 2005 was ameloblastic carcinoma listed as one of the odontogenic malignancies 8 .Ameloblastic carcinoma is defined as a rare malignant epithelial tumour that retains the histologic features of ameloblastic differentiation and yet also exhibits cytologic features of malignancy 1 . This malignant epithelial proliferation can be either carcinoma ex ameloblastoma or de novo ameloblastic carcinoma 1,7 .Here, we describe a case of spindle-cell ameloblastic carcinoma in a 60-year-old woman, with details of clinical, radiographic, and unusual histologic features suggesting that the tumour probably arose in a pre-existing unicystic ameloblastoma. To our knowledge, only 6 cases of ameloblastic carcinoma with spindle-cell histology have been published 4,9-11 , and of those, only 2 were diagnosed as spindle-cell ameloblastic carcinoma 12,13 . This third published case appears to be the first spindlecell ameloblastic carcinoma arising in a pre-existing unicystic ameloblastoma. CASE DESCRIPTIONIn March 2009, a 60-year-old woman presented in our department with a 19-year history of left mandibular swelling. She had first noticed a small swelling on the left side of the mandible for which she received surgical treatment in a government hospital in 1990, but no histology was done at that time. After 2 months, the swelling reoccurred, and the patient was again treated surgically, but she got no relief. The swelling gradually increased, reaching a size that had been causing the patient difficulty in eating and swallowing for 2-3 months before her presentation to us.Extraoral examination revealed a large irregular swelling in relation to the body of mandible on left side, extending to involve the ramus of mandible on the same side and across the midline to involve the parasymphyseal and right-side body of the mandible (Figure 1). The approximate size of the swelling was 15×9 cm. The overlying skin was smooth and normal in color, with a shiny surface. A sinus opening was ABSTRACT Spindle-cell differentiation in ameloblastic carcinoma is a rare event. Although reported by many authors, it was first described as a separate entity in 1999 by Slater under the heading "low-grade spindlecell ameloblastic carcinoma." Here, we report a case of low-grade spindle-cell ameloblastic carcinoma arising in pre-existing unicystic ameloblastoma.The patient, a 60-year-old Indian woman, had a large irregular swelling in the left mandibular region. Histologically, the lesion was composed of a large cystic cavity with an ameloblastomatous lining and areas showing spindle-cell proliferation. The spindle cells showed hyperchromatism, nuclear pleomorphism, and scattered mitotic figures. To our knowledge, 6 cases of spindle-cell ameloblastic carcinoma have been published to date, and this case appears to be the first reporting malignant transformation with spindle-cell differentiation in unicystic ameloblastoma.

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“…Our observation showed that follicular ameloblastoma was the most prevalent histological Section: Dentistry variant with 42.5% in the present study and agrees with reports in the literature. [24][25][26] A study conducted by Muslim et al also showed similar results. [19] This was followed by acanthomatous type (32.5%).…”

Section: Discussionmentioning

confidence: 58%

Assessment of Various Histopathological Variants of Ameloblastoma among Kashmiri Population: A Retrospective Study

Nadaf¹,

Farooq²,

Hakim³

2018

AIMDR

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Background: Ameloblastoma is a locally invasive odontogenic tumour arising from the remnants of dental organ and dental lamina and is a highly destructive benign tumour of odontogenic origin. Nine percent of odontogenic tumours are ameloblastomas. . Methods: The histological variants of Ameloblastomas are manifold, follicular, plexiform and acanthomatous are the most common ones among them. Ameloblastomas are classified radiologicaly into unilocular, multilocular and peripheral types. The present study is a descriptive retrospective study conducted to evaluate the histopathological variants of ameloblastoma. Results: The histopathological reports of the patients were reviewed for a period of 10 years. 40 patients were included in the study. Prevalence rate of 7.4% was seen. Age range of the patients of ameloblastoma was from 20-60 years. The most common age groupwas in the 3rd decade of life with more male predilection. Conclusion: The most common variant of ameloblastoma was of follicular variety. The most common site of occurrence of follicular ameloblastoma was posterior mandible.

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Ectodermal odontogenic tumours: analysis of 197 Nigerian cases

Cited by 23 publications

References 22 publications

Maxillofacial Tumors and Tumor-like Lesions in a Nigerian Teaching Hospital: an eleven year retrospective analysis

Maxillofacial Tumors and Tumor-like Lesions in a Nigerian Teaching Hospital: an eleven year retrospective analysis

Low-Grade Spindle-Cell Ameloblastic Carcinoma: Report of an Unusual Case with Immunohistochemical Findings and Review of the Literature

Assessment of Various Histopathological Variants of Ameloblastoma among Kashmiri Population: A Retrospective Study

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