[Dentigerous cyst. Report of an unusual case]

An up-to-date review on dentigerous cysts is carried out and the fact that no report has been found in the medical literature on a similar case to that one of our patient is pointed out. The clinical picture, radiographic characteristics, diagnosis, treatment and prognosis of these cases are described. Peculiarity of our patient because of the amount of teeth contained in the cyst, as well as persistence of deciduous teeth, is outlined.