Surgical treatment for symptomatic non-ossifying fibromas of the lower extremity with calcium sulfate grafts in skeletally immature patients
Non-ossifying fibromas (NOFs) are common benign metaphyseal bone lesions of unknown etiology that occur in children and young adults . They commonly arise in the distal femur, proximal tibia and fibula. The peak incidence is between 4—8 years  and they are often discovered incidentally on plain radiographs . Physical examination is usually unremarkable. While the vast majority of NOFs are asymptomatic, lesions causing chronic pain and pathologic fractures have been described .