RT Journal Article SR Electronic T1 Osteoid Osteoma of the Mandible – Clinical and Histological Findings JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 291 OP 296 DO 10.21873/anticanres.13110 VO 39 IS 1 A1 LEVI MATTHIES A1 TIM ROLVIEN A1 THOMAS J. PAKUSA A1 CHRISTIAN KNIPFER A1 MARTIN GOSAU A1 MICHAEL AMLING A1 REINHARD E. FRIEDRICH A1 JOZEF ZUSTIN YR 2019 UL http://ar.iiarjournals.org/content/39/1/291.abstract AB 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.