Percutaneous cryoablation for a symptomatic non-ossifying fibroma. A case report.

Non-ossifying fibromas (NOFs) are common benign metaphyseal bone lesions of unknown etiology that occur in children and young adults [1]. They commonly arise in the distal femur, proximal tibia and fibula. The peak incidence is between 4—8 years [2] and they are often discovered incidentally on plain radiographs [3]. Physical examination is usually unremarkable. While the vast majority of NOFs are asymptomatic, lesions causing chronic pain and pathologic fractures have been described [4].