Osteoid osteoma of the mandible – Clinical and histological findings

Abstract

Background/Aim: Osteoid osteoma (OO) is a benign tumor characterized by the excessive formation of unmineralized bone matrix. It is mostly located in the long bones of the lower extremities or the spine, but can also occur in atypical locations. Patients and Methods: Here we report on a rare case of OO in the mandible in an 18-year-old male patient with a simultaneous finding of a pilomatrixoma in the parietal region. Initially, a biopsy had been taken due to an unclear tumor mass and non-specific pain adjacent to tooth 46. Results: The detailed radiographic and histopathological analysis revealed the diagnosis of OO in terms of a characteristic radiolucent nidus and structurally disorganized woven bone with osteoid, respectively. The tumor was subsequently completely resected resulting in a complete recovery of symptoms. Conclusion: As we demonstrate an infrequent finding of OO in the mandible, it is important to diagnose and treat this condition appropriately.