Hybrid odontogenic tumor of calcifying odontogenic cyst and ameloblastic fibroma

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
Jung Hoon YoonJin Kim

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.

Citations

Dec 1, 2008·Head and Neck Pathology·Vanessa de Fátima BernardesRicardo Santiago Gomez
Jun 13, 2018·International Journal of Surgical Pathology·Paola Aristizabal ArboledaRicardo Martínez Pedraza
Mar 16, 2011·The Journal of Craniofacial Surgery·Eduardo Costa Studart SoaresAna Paula Negreiros Nunes Alves
Oct 1, 2019·Case Reports in Dentistry·Akari NodaKazuto Hoshi
May 3, 2014·The Journal of Craniofacial Surgery·Jun LeeJung-Hoon Yoon
Apr 2, 2008·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·Sang-Gun AhnJung-Hoon Yoon
Aug 18, 2017·The Journal of Contemporary Dental Practice·Soussan Irani, Forough Foroughi

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