Abstract
A dentigerous cyst associated with a permanent tooth is frequently encountered a type of odontogenic cyst, but this cyst rarely arises in a deciduous tooth. We describe a one-year-old boy with a dentigerous cyst of a deciduous canine tooth. Marsupialization of the cyst was performed with the patient under general anesthesia. Presently, about one year after operation, the canine tooth has completely erupted and is functioning normally.