Abstract
Clear cell calcifying epithelial odontogenic tumour (CCEOT) is a rare variant of calcifying epithelial odontogenic tumor (CEOT). While it is not surprising to find clear cells in odontogenic lesions, the exact nature of the clear cells in CCEOT has not been elucidated. Herein, we report a case of peripheral CCEOT of anterior mandible in a 37 year old black female. Histologically, the tumour consisted of cords and small nests of clear cells surrounded by dense deposits of amyloid and basophilic calcifications. The cells possessed abundant clear cytoplasm and eccentrically located indented nuclei. Admixed with the clear cells were eosinophilic cuboidal to polyhedral cells. The clear cells were PAS negative and immunoreactive for S100 protein, CD1a and Langerin. The clear cells were negative for MNF-116, SMA, Desmin and CK-19. It is therefore recommended to recognize two variants of CCEOT, namely, CEOT with clear cell change and CEOT with clear Langerhans cells (LC). We further suggest that the contradictory term “non-calcifying variant of calcifying epithelial odontogenic tumour with LC” to be abandoned, as the current case clearly indicates that LC could be seen in CEOT irrespective of the presence or absence of calcifications.
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Acknowledgments
We would like to thank Dr. Ismail Gopal, head of oral and maxillofacial surgery unit, Livingstone hospital, for providing us with the radiograph, Mr. Wessel Kleinhans, IT specialist, NHLS, for his technical support, Mrs. Claudette Gobregts, consultant sales manager, SMM instruments, for providing the antibody Langerin and finally Mr. Ben Henrico, head of immunohistochemistry, Tygerberg Laboratories, for his kind assistance.
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The authors declare that they have no conflict of interest.
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Afrogheh, A., Schneider, J., Mohamed, N. et al. Calcifying Epithelial Odontogenic Tumour with Clear Langerhans Cells: A Novel Variant, Report of a Case and Review of the Literature. Head and Neck Pathol 8, 214–219 (2014). https://doi.org/10.1007/s12105-013-0490-8
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DOI: https://doi.org/10.1007/s12105-013-0490-8