Mandibular cementifying fibroma and cementoblastoma: a case report

We reported a case of a 10-year-old girl with cementifying fibroma and cementoblastoma co-existed in the right mandible. Her right mandible swelled and became asymmetry in one month. Radiographically, a radiopaqueradiolucent lesion in anterior site and a radiopaque mass in posterior site were revealed. With fibrous dysplasia (anterior lesion) and odontoma (posterior lesion) as our initially diagnosis, fenestration and resection surgery were performed, and finally the cementifying fibroma and cementoblastoma were confirmed by histopathology examination. Cementoblastoma is a slow-growing benign neoplasm originating from mesenchymal tissue, while cementifying fibroma arises from the periodontal ligament related to bone tissue. It is a rare case with these two lesions co-existed in the mandible.