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Mandibular hybrid odontogenic tumor.
Oral Maxillofac Surg
January 2025
Department of Dentistry, State University of Maringá (UEM), Maringá, Brazil.
Background: Hybrid Odontogenic Tumors (HOT) are defined by the presence of two or more independent odontogenic tumors that originate from and affect the same maxillofacial site.
Methods: The present study is the first case report of a mandibular HOT consisting of Ameloblastoma, Calcifying Epithelial Odontogenic Tumor, and Ameloblastic Fibroma.
Case Report: A 37-year-old otherwise healthy male presented with the chief complaint of swelling in the right mandibular body.
Are Ameloblastic Fibroma-related Lesions True Tumors?: Evidence Through CNA and BRAF Mutation Analysis.
Am J Surg Pathol
October 2024
Department of Oral Pathology, Peking University School and Hospital of Stomatology.
Ameloblastic fibroma (AF) and related lesions, namely ameloblastic fibrodentinoma (AFD) and ameloblastic fibro-odontoma (AFO), span a spectrum from true neoplasms to hamartomas. The 2017 World Health Organization classification proposes that AFD and AFO are precursors to odontomas, yet their precise nature remains uncertain. This study examined 19 AF cases, 4 AFD, 15 AFO, 19 odontomas (OD, 14 complex, 5 compound), and 2 ameloblastic fibrosarcomas (AFS), focusing on clinical characteristics, recurrence, and molecular profiles.
View Article and Find Full Text PDFImmunohistochemical Evaluation of p300, H2AacK5 and H3AcK27 in Odontogenic Cysts and Tumors.
Oral Dis
October 2024
Cell Culture Laboratory, School of Dentistry, Federal University of Pará, Belém, Brazil.
The acetylation of histones H2A on lysine 5 (H2AacK5) and H3 on lysine 27 (H3AcK27) modulate several cellular mechanisms through the p300 enzyme in pathological lesions; however, their role in odontogenic lesions has not been addressed. This study aims to evaluate the immunoexpression of p300, H2AacK5, and H3AcK27 in samples of ameloblastoma (AMB) (n = 30), odontogenic keratocyst (OK) (n = 15), adenomatoid odontogenic tumor (AOT) (n = 10), odontogenic fibroma (OF) (n = 8), calcifying odontogenic cyst (COC) (n = 8), odontogenic myxoma (MIX) (n = 10), and ameloblastic fibroma (AF) (n = 06). The percentage of p300-positive cells was higher in AOT and decreased in COC, OK, AMB, AF, OF, and MIX.
View Article and Find Full Text PDFEpidemiology of odontogenic tumours and selected cysts diagnosed at a single New Zealand oral pathology centre- A 15-year retrospective study.
Oral Maxillofac Surg
December 2024
Department of Oral Diagnostic and Surgical Sciences, University of Otago, Dunedin, New Zealand.
Article Synopsis
- The research analyzed the occurrence of odontogenic tumors (OT) and certain cysts at an oral pathology center in New Zealand over 15 years, revealing that 1.8% of biopsies were identified as these conditions.
- The most common types identified were odontoma, ameloblastoma, and cemento-ossifying fibroma, with male patients and those diagnosed in the mandibular region being more prevalent.
- The study highlighted the importance of long-term monitoring for patients with OKC and ameloblastoma due to their recurrence rates of 15.2% and 13.7%, respectively.
Synchronous cemento-ossifying fibromas: a systematic review.
Med Oral Patol Oral Cir Bucal
September 2024
Universidade Federal do Rio Grande do Sul Faculdade de Odontologia, Rua Ramiro Barcelos, 2492, sala 503 CEP: 90035-003, Santana, Porto Alegre RS, Brazil
Article Synopsis
- - This systematic review analyzed published data on synchronous cemento-ossifying fibromas (COF), including their demographic and clinical features, utilizing various databases and following PRISMA guidelines.
- - A total of 19 studies with 20 COF cases were examined, revealing a mean patient age of 35 years, a predominance of female patients (60%), and simultaneous involvement of the mandible and maxilla in 65% of cases.
- - Management typically involved surgical procedures, with a recurrence rate noted in 15% of cases that had follow-ups, and the findings suggest that synchronous COF is rare, especially affecting women in their 30s.
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