Abstract
A dentigerous cyst is a developmental odontogenic cyst that usually occurs in the second and third decade of life. It is characterized by a unilocular radiolucent lesion that encloses a permanent tooth. Dentigerous cysts cause several complications such as swelling, noneruption of involved teeth, and displacement of adjacent teeth, thus requiring early detection and prompt treatment. The aim of the present work is to report an unusual presentation of a dentigerous cyst in a young patient, a 12-year-old boy, which developed around an unerupted maxillary tooth as an exuberant alveolar expansion. Radiographically, a multiloculated lesion was revealed, delimited, measuring 3 × 2 cm, encompassing impacted #11, 12 teeth. After puncture, there was suggestion of a cystic lesion. In this case, marsupialization was performed following enucleation after 1 year. The case has been in follow-up for 5 years.
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