Sunday, December 27, 2009
A bone island, also known as an enostosis, is a focus of compact bone located in cancellous bone. This is a benign entity that is usually found incidentally on imaging studies; however, the bone island may mimic a more sinister process, such as an osteoblastic metastasis such as from prostate cancers. They are considered to be benign lesions without associated morbidity or mortality. There is no racial predilection recognized.
They are common in the adult population and are rare in children. They demonstrate characteristic radiographic findings and no clinical follow-up necessary.