Pericoronal radiolucency associated with incomplete crown
A 12-year-old male patient was referred from a private dental clinic to evaluate a cystic lesion at the left mandibular posterior region. On clinical examination, there was a painful mild swelling of the left mandibular angle area. The pain and swelling had started 3 days earlier but had subsided somewhat after the medication. A panoramic radiograph revealed a well-defined round unilocular radiolucency surrounding the developing crown of the left lower third molar without completion of the cemento-enamel junction (). The CBCT images showed a well-defined round radiolucency with no cortical expansion surrounding the underdeveloped crown of the lower left third molar. The mandibular canal was identified inferior and lingual to the lesion (). A provisional diagnosis of odontogenic keratocyst was made, and the lesion was excised with the extraction of the involved tooth. The histopathological diagnosis proved to be a dentigerous cyst.