Peri-Implant Squamous Odontogenic Tumor:

Exceptional Evolution of a Squamous Odontogenic Tumor in the Jaw: Molecular Approach

A squamous odontogenic tumor (SOT) is an epithelial locally benign neoplasia derived from the periodontium of the jaws. It is considered a lesion of low incidence. Predominantly, it affects the mandible, although both jaw bones may be involved. Here, we discuss the malignant clinical evolution of an SOT lesion in an 80-year-old female patient. The patient exhibited an expansive triangular lesion at the inferior right quadrant. Surgery was performed and an SOT was diagnosed (2019). Two years after, the lesion grew, and the analysis of the biopsy revealed SOT malignization with pleomorphic atypical squamous cells, characteristics of a squamous cell carcinoma (2021). Massive DNA sequencing of formalin-fixed-paraffin-embedded specimens of the initial and relapsed tumors indicated pathogenic mutations in RET and POLE genes in both tumors, loss of ALK, and gain of CDKN1B and MAP2K in the relapse. In addition, the clinical, radiographic, and microscopic features of this neoplasm are discussed and compared with those already published. The case presented contributes to the better understanding of this SOT tumor entity and to indicates its malignant evolution, together with its biological behavior and its histologic, clinical, and radiographic features. Also, it aims to stress the importance of deeper genetic analyses in rare diseases to uncover mutations that help to select a personalized treatment.

Cystic epithelial lining seen around a dental implant: A case report of a rare finding

Dental implants have been successfully used for over 30 years, with a low complication rate. Peri-implant pathologies have recently seen an increase in incidence. This case report elucidates a rare case implant failure that occurred shortly after prosthetic loading, where the clinical signs mimicked peri-implant disease and attending bone loss, but the final histological report confirmed presence of a cystic lining around the implant. The manuscript also emphasizes the possible causes and management of such complications. To the best of our knowledge, this represents one of the first publication of an evident peri-implant cystic lining in a case exhibiting no radiographic evidence of the same.

A squamous odontogenic tumor following an orthodontic micro-screw: A rare case report and review of the literature

We reported a very rare case of squamous odontogenic tumor(SOT) in a 23-year-old female. The tumor arose after an implanting operation of an orthodontic micro-screw, and was definitely diagnosed by the histopathological examination. Based on the case report and a review of the literature, we discussed about the general features, differential diagnosis and pathogenesis of SOT.

Multicentric Squamous Odontogenic Tumor: A Case Report and Review of the Literature

Squamous odontogenic tumor (SOT) is a rare benign epithelial odontogenic neoplasm of the jaws. Both intraosseous and peripheral SOTs have been described in the English language literature. While most intraosseous SOTs occur as solitary lesions, a multicentric variant has also been previously described. Although the radiographic and microscopic features are identical for both solitary and multicentric clinical presentations, there are three significant differences between them. More specifically, multicentric SOT presents at an earlier age (third decade of life), has a slightly higher male to female ratio than the solitary type and has a marked predilection for African-Americans. Here we document the eighth reported case of multicentric SOT, which was diagnosed in a 43-year-old African-American male. In addition, we feature focal sebaceous metaplasia, a heretofore unknown microscopic feature of SOT. Clinical, radiological, and histopathological findings are discussed. The differential diagnosis, biological behavior and management modalities for SOT are also addressed.

Recurrent squamous odontogenic tumor: A case report and review of the literature

Squamous odontogenic tumors (SOTs) are benign, locally infiltrative neoplasms that localize to the periodontium. In total, <50 cases have been reported since the first description of SOTs in 1975. Although the exact etiology of SOTs is unknown, the tumors are considered to derive from the epithelial cell rests of Malassez. SOTs are characterized by radiological and clinical signs and symptoms, including pain with increased sensitivity in the affected area, bone expansion and increased tooth mobility. The present study describes the case of a patient that experienced numerous SOT recurrences and also discusses recommendations for treatment. A locally invasive mandibular SOT was identified in a Caucasian 41-year-old female patient. The treatment involved recommended conservative surgery, including local curettage. In addition, 49 cases published in the literature were reviewed to assess the treatment strategies. The present patient experienced two recurrences of the tumor during the 6-year follow-up period. Ultimately, the vitality of the adjacent teeth was compromised. An apicoectomy with a small amount of resection of the marginal bone was necessary. In >50% of the reported cases of SOT in the literature the adjacent teeth were extracted. The present case of SOT and the associated literature were also discussed. It was concluded that the treatment of choice appears to be a conservative surgical removal, but the successful management of SOTs often requires the removal of the adjacent teeth.

Squamous Odontogenic Tumor: Literature Review Focusing on the Radiographic Features and Differential Diagnosis

Since its first publication in 1975, the squamous odontogenic tumor remains the rarest odontogenic lesion, with around 50 cases in the English-language literature in which the microscopic characteristics are frequently very well demonstrated. However, articles which discuss the radiographic aspects are scarce, especially with emphasis on the differential diagnosis. The present treatise proposes an assessment of jaw lesions with the same radiographic characteristics of the squamous odontogenic tumor to clarify the main findings for dental clinicians during routine diagnosis.

Peri-Implant Cystic Lesion With Unusual Cellular Changes: A Case Report

INTRODUCTION

This report describes the history and management of a cyst developing in anatomic contact with an immediately placed dental implant.

CASE PRESENTATION

The lesion presented clinically as a facial swelling of the gingiva adjacent to an osseointegrated and restored maxillary right lateral incisor implant. Radiographs showed a well-circumscribed radiolucency, which was contiguous with the implant surface. After reflection of a mucoperiosteal flap, the lesion was enucleated in toto, and the defect was curetted. The bony defect was grafted, and the lesional tissues were sent for histologic analysis. The results demonstrated the presence of a cyst of unknown origin with some unusual cellular changes in localized areas of the cyst lining resembling ameloblasts. Healing occurred uneventfully, and the patient was monitored for recurrence. At the 2-year follow-up appointment, the patient presented no clinical or radiographic signs of recurrence of the lesion. The etiology of this lesion is unknown.

CONCLUSION

This case emphasizes the need for histologic diagnosis of peri-implantitis lesions and suggests a need for expansion of the current classification system for peri-implantitis lesions.