Non-traumatic hypertrophic callus of the fibula mimicking osteosarcoma in osteogenesis imperfecta type V: a case report.

We report a case of hyperplastic callus mimicking osteosarcoma in the fibula of a patient with osteogenesis imperfecta type V. Among the various imaging modalities, computed tomography was the most useful in distinguishing this rare process from a malignant entity. In addition, simple radiographs demonstrated the presence of characteristic "zebra lines", a manifestation of cyclic bisphosphonate therapy during childhood.