1. X-ray finding: There is a well-defined unilocular oval shaped circumcoronal radiolucence with a corticated border over the submerged tooth 48 extending from retromolar area down to the mandibular angle, measuring approximately 1*2 cm in diameter.

2. Features of Dentigerous Cyst Most common odontogenic cyst, next to radicular cyst. Etiology X-ray Site P’t ages: usually adolescents, 20~40 years old. Eruption cyst Effects on adjacent tooth Treatment Progonosis Ameloblastic change (neoplastic transformation)

3. Differential diagnosis Mural ameloblastoma

4. Adenomatoid Odontogenic Tumor (AOT) Differential diagnosis

5. Ameloblastic fibroma Differential diagnosis

6. Paradental cyst Differential diagnosis