1. An intraosseous sclerosing odontogenic tumor predominantly composed of epithelial cells: relation to (so-called) sclerosing odontogenic carcinoma and epithelial-rich central odontogenic fibroma.
- Author
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Tan SH, Yeo JF, Kheem Pang BN, and Petersson F
- Subjects
- Adult, Biomarkers, Tumor analysis, Diagnosis, Differential, Female, Humans, Immunohistochemistry, In Situ Hybridization, Fluorescence, Radiography, Panoramic, Epithelial Cells pathology, Mandibular Neoplasms pathology, Mandibular Neoplasms surgery, Odontogenic Tumors pathology, Odontogenic Tumors surgery
- Abstract
We report a case of an asymptomatic sclerosing odontogenic tumor in a 31-year-old woman. Radiologically, the tumor was well circumscribed, was predominantly radiolucent, and had a peripheral sclerotic margin. Histopathologically, the tumor showed small clusters, strands, and cords of small to medium-sized epithelial tumor cells in a sclerotic collagenous stroma. Immunohistochemically, the tumor cells were positive for broad-spectrum cytokeratins (CKs) (CK7, CK5/6, CK19, and CAM 5.2) and p63. Membranous staining for E-cadherin was present. There was weak to moderate nuclear expression of p16 in 30% of cells. Rare tumor cells were positive for p53. Progesterone receptors were expressed in about 60% of the tumor cells. The proliferative activity (Ki-67) was approximately 2%. A molecular genetic (fluorescence in situ hybridization) study showed no EWSR1 (EWS RNA-binding protein 1) gene rearrangement. No recurrence or metastatic events have been documented at 1-year follow-up. This tumor represents a classification dilemma mainly between epithelial-rich central odontogenic fibroma and the so-called sclerosing odontogenic carcinoma., (Copyright © 2014 Elsevier Inc. All rights reserved.)
- Published
- 2014
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