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Hybrid odontogenic tumor of calcifying odontogenic cyst and ameloblastic fibroma
Authors:Yoon Jung Hoon  Kim Hyung Jun  Yook Jong In  Cha In Ho  Ellis Gary L  Kim Jin
Affiliation:Department of Oral Pathology, College of Dentistry, Chosun University, Korea.
Abstract:
Odontogenic tumors composed of 2 distinct types of lesions are unusual. We report an odontogenic tumor that was composed of calcifying odontogenic cyst and ameloblastic fibroma that occurred in the right posterior maxilla of a 22-year-old Korean woman. The tumor had a cystic component with an ameloblastic epithelial lining and conglomerates of so-called ghost cells, and there were deposits of dentinoid material adjacent to the cyst. These are features characteristic of calcifying odontogenic cyst. Enamel organ-like epithelial islands were observed within a dental papilla-like stroma of the cyst wall. Additionally, a solid portion of the tumor had characteristic features of ameloblastic fibroma, i.e., a myxoid cellular stroma with numerous elongated islands of ameloblastic epithelium. Ghost cell masses were found in the area of ameloblastic fibroma as well. The distribution of the ghost cells suggests that this is a hybrid lesion rather than a collision tumor.
Keywords:
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