Osteoid Osteoma of the Distal Fibula: a Case Report of a Very Rare Location Treatment

Osteoid Osteoma (OO) is a very common small benign osteoblastic tumor. It represents 10% of all bone benign lesions, and is usually localized to the proximal metadiaphysis of the femur. We report the case of an OO localized in the distal inner metadiaphysis of the fibula. To our knowledge this is the first report in literature. We performed enbloc resection because of the deep localization of the lesion, which was not reachable by minimally invasive procedures. At 6 months follow-up bone stock reconstitution was observed, and no relapse occurred at 1 year. Plain X-rays are generally sufficient to make a diagnosis. When radiological findings are not suggestive, computed tomography and bone scan represent second level examinations. Minimally invasive procedures represent a promising and valuable treatment, but open surgery shall be still taken in account when the location is not easy to reach and/or it is in proximity to neurovascular structures.