Aggressive plexiform mandibular ameloblastoma arising from a dentigerous cyst: A case report

Among odontogenic cysts, dental cysts (DC) and among odontogenic tumors, ameloblastoma are the most common. Odontogenic tumors such as ameloblastoma can develop from the cyst lining of the dentigernary cyst and also the odontogenic keratocyst. DC is the most common form of odontogenic cyst, which results from the accumulation of fluid between the reduced enamel epithelium and the tooth crown and is clinically, associated with an unerupted tooth, usually an unerupted mandibular third molar, maxillary canine, and mandibular premolar. Radiographically, unilocular x-ray fluorescence is noted with well-defined sclerotic margins surrounding the crown of an unerupted tooth. Ameloblastoma is a neoplasm classified as a benign epithelial odontogenic tumor of the jaw. 70% of ameloblastomas develop in the molar-ramus region of the mandible and are occasionally associated with an unerupted third molar. Histologically, most ameloblastomas have a follicular or plexiform pattern, although basaloid, granular, or desmoplastic cellular changes may also occur. This study presents a case of an aggressive plexiform mandibular ameloblastoma arising from the cyst lining of a dentigerous cyst in a 36-year-old male patient.