Cholesterol granuloma in the wall of dentigerous cyst

Cholesterol granuloma is an inflammatory reaction to cholesterol crystals deposition which may develop in a variety of sites including the middle ear, mastoid process or even paranasal sinuses. A dentigerous cyst is the one that encloses the crown of unerupted tooth by expansion of its follicle & is attached to the neck of the tooth. Histopathological examination usually shows a thin fibrous cyst wall which, being derived from dental follicle, consists of young fibroblast widely separated by stroma and ground substance rich in mucopolysaccharide. cholesterol crystals which presents as longitudinal clefts in histologic sections, are frequent feature in the inflammatory lesions like radicular cyst but are very rare in dentigerous cyst. This case study presents an unusual case of cholesterol granuloma occurring in dentigerous cyst wall.