Giant Bone Island of the Tibia in a Child.

Giant bone islands have been previously diagnosed only in adults. A symptomatic giant bone island of the tibial diaphysis in a 10-year-old boy is presented in this case report. Imaging investigation included plain radiographs, scintigraphy, computed tomography, and magnetic resonance imaging. Although the findings suggested a giant bone island, the appearance of several atypical imaging features necessitated an open biopsy. Histology confirmed the diagnosis of a giant bone island. Its length, which exceeded 10.8 cm, is the longest reported in the literature. No additional surgical intervention was required. The clinical symptoms and signs, as well as the radiographic appearance of the lesion, were not changed after 15-year follow-up.