-
Pediatric and Developmental Pathology :... 2023Odontogenic tumors are rare tumors of the jaws that arise from remnants of the tooth forming apparatus. Some odontogenic tumors demonstrate strong predilection for... (Review)
Review
Odontogenic tumors are rare tumors of the jaws that arise from remnants of the tooth forming apparatus. Some odontogenic tumors demonstrate strong predilection for pediatric patients including the unicystic ameloblastoma, adenomatoid odontogenic tumor, ameloblastic fibroma, ameloblastic fibro-odontoma, odontoma, and primordial odontogenic tumor. In this review, we discuss the clinical, radiographic, histopathologic, and molecular characteristics of select odontogenic tumors that demonstrate pediatric predilection and review management.
Topics: Humans; Child; Odontogenic Tumors; Ameloblastoma; Odontoma
PubMed: 38032744
DOI: 10.1177/10935266231200115 -
Oral and Maxillofacial Surgery Clinics... Aug 2024This article provides a comprehensive overview of benign non-odontogenic pathologies. Bone-derived lesions like osteoma, osteoid osteoma, osteoblastoma, and... (Review)
Review
This article provides a comprehensive overview of benign non-odontogenic pathologies. Bone-derived lesions like osteoma, osteoid osteoma, osteoblastoma, and osteochondroma are discussed in detail, emphasizing their radiographic features, locations, and treatment strategies. Cartilage-derived lesions such as chondroma, chondroblastoma, and chondromyxoid fibroma are also examined, noting their typical presentation and management approaches. The article then delves into fibroconnective tissue lesions. Mesenchymal and vascular lesions are detailed regarding their clinical and radiographic characteristics and treatment options. Lastly, nerve-derived lesions like schwannoma and neurofibroma are covered, providing insights into their association with diseases like neurofibromatosis and preferred management strategies.
Topics: Humans; Child; Bone Neoplasms
PubMed: 38402139
DOI: 10.1016/j.coms.2024.01.007 -
Pediatric and Developmental Pathology :... 2023Evaluation of bone pathology within the head and neck region, particularly the gnathic bonesis is complex, demonstrating unique pathologic processes. In part, this... (Review)
Review
Evaluation of bone pathology within the head and neck region, particularly the gnathic bonesis is complex, demonstrating unique pathologic processes. In part, this variation is due to odontogenesis and the embryological cells that may be involved, which can contribute to disease development and histologic variability. As with any boney pathosis, the key is to have clinical correlation, particularly with radiographic imaging prior to establishing a definitive diagnosis. This review will cover those entities that have a predilection for the pediatric population, and while it is not all inclusive, it should serve as a foundation for the pathologist who is evaluating bony lesions involving the craniofacial skeleton.
Topics: Humans; Child; Bone and Bones; Neck; Neoplasms; Odontogenic Tumors
PubMed: 37232383
DOI: 10.1177/10935266231170744 -
Modern Pathology : An Official Journal... Feb 2024Cemento-ossifying fibroma (COF) of the jaws is currently classified as a benign mesenchymal odontogenic tumor, and only targeted approaches have been used to assess its...
Cemento-ossifying fibroma (COF) of the jaws is currently classified as a benign mesenchymal odontogenic tumor, and only targeted approaches have been used to assess its genetic alterations. A minimal proportion of COFs harbor CDC73 somatic mutations, and copy number alterations (CNAs) involving chromosomes 7 and 12 have recently been reported in a small proportion of cases. However, the genetic background of COFs remains obscure. We used a combination of whole-exome sequencing and RNA sequencing to assess somatic mutations, fusion transcripts, and CNAs in a cohort of 12 freshly collected COFs. No recurrent fusions have been identified among the 5 cases successfully analyzed by RNA sequencing, with in-frame fusions being detected in 2 cases (MARS1::GOLT1B and PARG::BMS1 in one case and NCLN::FZR1 and NFIC::SAMD1 in the other case) and no candidate fusions identified for the remaining 3 cases. No recurrent pathogenic mutations were detected in the 11 cases that had undergone whole-exome sequencing. A KRAS p.L19F missense variant was detected in one case, and 2 CDC73 deletions were detected in another case. The other variants were of uncertain significance and included variants in PC, ACTB, DOK6, HACE1, and COL1A2 and previously unreported variants in PTPN14, ATP5F1C, APOBEC1, HDAC5, ATF7IP, PARP2, and ACTR3B. The affected genes do not clearly converge on any signaling pathway. CNAs were detected in 5/11 cases (45%), with copy gains involving chromosome 12 occurring in 3/11 cases (27%). In conclusion, no recurrent fusions or pathogenic variants have been detected in the present COF cohort, with copy gains involving chromosome 12 occurring in 27% of cases.
Topics: Humans; Cementoma; Fibroma, Ossifying; Odontogenic Tumors; Genomics; Protein Tyrosine Phosphatases, Non-Receptor; Adaptor Proteins, Signal Transducing; Ubiquitin-Protein Ligases
PubMed: 37995913
DOI: 10.1016/j.modpat.2023.100388 -
The British Journal of Oral &... Apr 2024This study presents the behavioural findings of central odontogenic fibroma (COF) in a specific ethnic group, analysing treatment methods and demonstrating how involved... (Review)
Review
This study presents the behavioural findings of central odontogenic fibroma (COF) in a specific ethnic group, analysing treatment methods and demonstrating how involved teeth should be managed in detail. Clinical, radiographic, and histological findings were gathered for 29 patients who visited our clinic, with all patients' data carefully examined by radiologists and reviewed microscopically. The cohort comprised 29 patients, with 16 females and 13 males, having a mean (SD) age of 33.1 (16.0) years. Among them, 19 patients were affected in the maxilla, with 15 showing anterior preference, and palatal depression was observed in six patients. Tooth resorption was evident in 15 patients, while 10 patients showed tooth displacement. Within the cohort, 13 patients underwent tooth extraction and resection, while the remaining 16 did not have teeth extracted. Notably, there was no significant difference in recurrence observed between these two groups. This study represents the largest study to date of COF within a single ethnic group and institution. A subset of cases exhibited noteworthy features of COF. However, intriguingly, despite these characteristics, the preservation of contiguous teeth did not demonstrate a significant impact on recurrence rates.
Topics: Humans; Female; Male; Odontogenic Tumors; Adult; Middle Aged; Fibroma; Adolescent; Tooth Extraction; Republic of Korea; Young Adult; Maxillary Neoplasms; Child; Neoplasm Recurrence, Local
PubMed: 38311535
DOI: 10.1016/j.bjoms.2023.12.008 -
Medicina Oral, Patologia Oral Y Cirugia... Nov 2023Odontogenic tumours are infrequent lesions. Studies on the frequency of odontogenic tumours from Latin America are scarce. This work aimed to determine the relative... (Review)
Review
BACKGROUND
Odontogenic tumours are infrequent lesions. Studies on the frequency of odontogenic tumours from Latin America are scarce. This work aimed to determine the relative frequency of odontogenic tumours in a Chilean population using the 2022 World Health Organization classification.
MATERIAL AND METHODS
This is a case series retrospective study. We reviewed 35,530 samples from 1975 to 2022 from the Oral Pathology Referral Institute and the Pathological Anatomy Service, Faculty of Dentistry, University of Chile. We utilized the 2022 World Health Organization classification for histological typification.
RESULTS
According to 2022 World Health Organization classification, 544 odontogenic tumours were confirmed. The most frequent odontogenic tumours were: odontoma (n=241; 44.3%), ameloblastoma (n=109; 20.0%) and cemento-ossifying fibroma (n=71; 13.1%). Benign odontogenic tumours corresponded to 538 cases (98.9%) and malignant tumours were only six cases (1.1%).
CONCLUSIONS
In our population, odontoma was the most frequent odontogenic tumour followed by ameloblastoma and cemento-ossifying fibroma. Malignant odontogenic tumours were very rare. The results of this study are similar to reports from America, but there are some differences concerning the data from Africa and Asia.
Topics: Humans; Ameloblastoma; Odontoma; Retrospective Studies; Cementoma; Chile; Odontogenic Tumors; World Health Organization
PubMed: 37823289
DOI: 10.4317/medoral.26008 -
Journal of Veterinary Dentistry Jan 2024Medical records of dogs with an initial histopathological diagnosis of odontogenic sarcoma were reviewed for information on signalment, body weight, medical history,...
Medical records of dogs with an initial histopathological diagnosis of odontogenic sarcoma were reviewed for information on signalment, body weight, medical history, clinical signs, physical examination and diagnostic imaging findings, surgical procedure performed, and histologic characteristics. Twenty dogs were deemed to fit the criteria following the rigorous histology review process. These tumors were characterized by hypercellularity of the spindle cell component with less intervening stroma, mitotic activity, and variable presence of odontogenic epithelium and hard substance (cementum/dentin/bone). Non-invasive or locally invasive hypercellular peripheral odontogenic fibroma is suggested by the authors to describe these tumors. There were no signs of recurrence of any of the masses following surgical excisions with varying margins.
Topics: Dogs; Animals; Fibroma; Odontogenic Tumors; Gingival Neoplasms; Dog Diseases
PubMed: 37475564
DOI: 10.1177/08987564231187080 -
Journal of Oral Pathology & Medicine :... Sep 2023PEA3 transcription factor has been identified as a downstream target of the MAPK and PI3K pathways, and PEA3 overexpression has been observed in a variety of tumor...
BACKGROUND
PEA3 transcription factor has been identified as a downstream target of the MAPK and PI3K pathways, and PEA3 overexpression has been observed in a variety of tumor types. We aimed to evaluate PEA3 expression in odontogenic cysts and tumors and compare the expression among odontogenic lesions. In addition, the correlations between PEA3 expression and clinicopathological characteristics of conventional ameloblastoma and unicystic ameloblastoma were investigated.
METHODS
This study was performed on 165 samples of odontogenic cysts and tumors including 20 dentigerous cysts, 20 odontogenic keratocysts, 16 adenomatoid odontogenic tumors, 5 ameloblastic fibromas, 45 unicystic ameloblastomas, and 59 conventional ameloblastomas. The sections were immunohistochemically stained with mouse monoclonal anti-PEA3 antibody and PEA3 expression was evaluated as the immunoreactive score.
RESULTS
PEA3 expression was absent in all dentigerous cysts (DCs) and odontogenic keratocysts, while all adenomatoid odontogenic tumors showed either no (75%) or low (25%) expression of PEA3. Most of the ameloblastic fibromas (60%) displayed no PEA3 expression. A high expression of PEA3 was observed in a substantial number of unicystic ameloblastomas (48.9%) and conventional ameloblastomas (49.2%) in our study. PEA3 expression in DCs, odontogenic keratocysts and adenomatoid odontogenic tumors were significantly different from that in conventional ameloblastomas and that in unicystic ameloblastomas (p < 0.05). The expression of PEA3 was significantly different in the age groups of unicystic ameloblastomas and histological subtypes of conventional ameloblastomas (p < 0.05).
CONCLUSION
PEA3 overexpression is predominant in unicystic ameloblastomas and conventional ameloblastomas compared to other odontogenic lesions, indicating a pivotal role of PEA3 as a downstream effector of MAPK pathway in these two odontogenic lesions.
Topics: Ameloblastoma; Dentigerous Cyst; Fibroma; Jaw Neoplasms; Odontogenic Cysts; Odontogenic Tumors; Phosphatidylinositol 3-Kinases; Humans
PubMed: 37549030
DOI: 10.1111/jop.13476 -
Head and Neck Pathology Sep 2023Granular Cell Odontogenic Fibroma (GCOF) is a rare odontogenic neoplasm reported over time with different names. The purpose of this study is to review all available...
BACKGROUND
Granular Cell Odontogenic Fibroma (GCOF) is a rare odontogenic neoplasm reported over time with different names. The purpose of this study is to review all available data on the GCOF in the scientific literature, with a summary of all reported cases and a report of a new case.
METHODS
This review was conducted following the PRISMA guidelines. An electronic search was performed up to November 2022.
RESULTS
Thirty-nine studies reporting fifty-three cases were included. GCOF is a rare neoplasm among the odontogenic tumors, with a higher prevalence in women of the middle-aged and white population. This lesion occurs mostly on the posterior region of the mandible. Furthermore, based on clinical, radiographic, and histopathologic features, conservative treatment was the most reported choice with recurrence reported in two cases.
CONCLUSION
GCOF remains controversial due to the still unsolved histogenesis.
Topics: Female; Humans; Middle Aged; Fibroma; Mandible; Odontogenic Tumors; Case Reports as Topic
PubMed: 37118351
DOI: 10.1007/s12105-023-01553-x