Pericoronal radiolucency associated with incomplete crown
A 6-year-old female patient was referred from a private dental clinic to evaluate the swelling at the left lower posterior region. On clinical examination, there was a 1-month duration of swelling of the left lower molar region. The patient's systemic medical history included unspecified thrombocytopenia and a bleeding tendency. A panoramic radiograph revealed multiple bilateral radiolucencies of the mandible and another separate well-defined round radiolucency involving the developing crown of the lower left second molar (). The left mandibular multilocular radiolucency involving the left lower second primary molar, the lower part of the developing premolars, and the mesial part of the lower left first molar had been operated on 1 year earlier, and the lesion was a giant cell granuloma. This time the unilocular cystic radiolucency-associated developing crown of the left lower second molar was to be managed. The cemento-enamel junction of the involved tooth was incomplete. The CBCT images showed bucco-lingually expanded cortical plates associated with the lesion and the mandibular canal was displaced inferiorly and lingually (). A provisional diagnosis of odontogenic keratocyst was made, and the lesion was excised with removal of the developing lower left second molar after platelet transfusion. The histopathological diagnosis proved to be a dentigerous cyst.