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A study of the distribution of B-cell lymphoma/leukemia-2 in odontogenic cyst and tumors: Histochemical study

 Department of Oral Pathology and Microbiology, Pacific Dental College and Hospital, Debari, Udaipur, Rajasthan, India

Correspondence Address:
Khushboo Phull,
Department of Oral Pathology and Microbiology, Pacific Dental College and Hospital, Debari, Udaipur, Rajasthan
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Source of Support: None, Conflict of Interest: None

Introduction: The odontogenic keratocyst is known for its aggressiveness, high recurrence rate, and transformation of keratinized epithelia to nonkeratinized squamous epithelium for which inflammation has been suggested to be responsible. B-cell lymphoma/leukemia-2 (Bcl-2) an anti-apoptotic protein, prolongs the life span of epithelial cells and allows proliferation, differentiation, and morphogenesis. Materials and Methods: Study was carried out comprising of 90 cases; (30 ameloblastoma, 30 keratocystic odontogenic tumor (KCOT), and 30 radicular cyst). Bcl-2 expression was determined with respect to localization, area (percentage) and intensity of stained cells in epithelium, and connective tissue stroma by counting the endothelial, round, and fusiform cells. Results: In epithelium bcl-2 expression in KCOTs was higher followed by ameloblastoma and lowest in the radicular cyst. Whereas, in connective tissue stroma bcl-2 expression was higher in KCOT and radicular cyst than ameloblastoma cases. Solid variants showed statistically higher expression as compared to the unicystic variants of ameloblastoma (P = 0.009, 0.033, 0.011, and 0.041). Conclusion: High expression of bcl-2 in KCOT supports the general agreement that some features of KCOT are those of a neoplasia. The bcl-2 expression in connective tissue cells suggests that these cells may also be important as epithelial cells in the biological behavior odontogenic keratocyst

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