Dentigerous cyst associated with an ectopic tooth

Dentigerous cysts originate from the reduced enamel epithelium, are associated with included teeth, and are one of the most common odontogenic cysts. Most of the reported cases have been mandibular and associated with the third molar. The present case is an example of atypia of dentigerous cysts, presenting its association with a mandibular ectopic molar and also the presence of two periapical cysts. The diagnosis and treatment designed for each case and the emphasis on radiographic support for the detection of dental cysts are important since when they are associated with included teeth, their clinical appearance is not frequent, but rather as a radiographic finding.