Pericoronal radiolucency associated with incomplete crown
A 12-year-old female patient was referred from a private dental clinic for evaluation of a cystic lesion at the right mandibular posterior region. On clinical examination, there were no specific symptoms, but the patient complained of having had a pus taste for the previous 6 months. A panoramic radiograph revealed a well-defined round unilocular radiolucency surrounding the transversely positioned crown of the lower right third molar (). The CBCT images showed a bucco-lingually expanded cystic lesion associated with the buccally displaced, developing right lower third molar, but the cemento-enamel junction of the crown was incomplete. The mandibular canal was displaced downward due 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 an odontogenic keratocyst.