Abstract
Juxta-cortical chondroma is a rare cartilaginous tumor originating from the periosteum. On conventional radiography, the lesion typically causes saucerization of the adjacent cortex with well-delineated sclerotic margins. Projection radiography may be less accurate than cross-sectional imaging to demonstrate the precise extent of pressure erosion and bone and soft tissue extent. Although magnetic resonance imaging (MRI) is the imaging technique of choice for further preoperative evaluation, cone-beam computed tomography (CT) may be of additional value. Due to its high spatial resolution, cone-beam CT may detect very tiny matrix calcifications and allows a more precise evaluation of the saucerized cortex at a low radiation dose.