Pericoronal radiolucency associated with incomplete crown
A 9-year-old male patient was referred from a private dental clinic for evaluation of a hard mass in the left mandibular angle region. On clinical examination, there was a painful swelling of the left mandibular angle. The pain and swelling had first been noticed 1 year earlier, but only medication was applied, and then pus drainage through the gingival swelling of the lower left first and second molar area had been started 1 month before presentation to our clinic. A panoramic radiograph revealed a well-defined round unilocular radiolucency surrounding the developing crown of the lower left third molar, which was displaced distally to the mandibular ramus, and the cemento-enamel junction of the tooth was incomplete (). The CBCT images showed a bucco-lingually expanded cortical plate associated with the lesion, which surrounded the underdeveloped crown of the lower left third molar (). 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.